Compatibility Tables of Converted Extensions

Extension Compatibility Tables for SeaMonkey

Quick navigation: Firefox extensions | Thunderbird extensions

This is a list of Firefox and Thunderbird extensions that have been tested in SeaMonkey after running them through the converter. This list is not complete – there may be many other extensions working fine after conversion so feel free to experiment with the converter yourself and let us know about the results.

Firefox extensions

Adblock Plus Pop-up Addon Compatible
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Adblock Plus Pop-up Addon extends the blocking functionality of Adblock Plus to those annoying pop-up windows that open on mouse clicks and other user actions.
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Add-on Compatibility Reporter Not compatible
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Help make Firefox better. The Add-on Compatibility Reporter enables you to report if the Firefox add-ons that you're using are working properly.
Tested Versions: 2.0.6.1-signed
Compatibility Notes: On AMO tagged as not available for SeaMonkey,Add-on Compatibility Reporter[converted] 2.0.6.1-signed installs without problems, but does NOT work for me after conversion with English SeaMonkey 2.45a1 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 Build 20160308001946 (Default Classic Theme) on German WIN7 64bit: I do not see anything new in Add-Ons-Manager.
All-in-One Gestures Not compatible
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This extension allows you to execute common commands using mouse gestures, rocker navigation, scroll wheel navigation and page...
Compatibility Notes: It can be forced to work somehow but is buggy and many features don't work. Use Mouse Gestures Suite instead.
Ant Video Downloader Not compatible
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It has never been simplier to download videos from Youtube, Dailymotion and from most of the video streaming site. Just play the video, click on the toolbar, download and play it immediately in our integrated video player.
Autofill Forms Compatible
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Autofill Forms enables you to fill out web forms with one click.
Tested Versions: 1.0.2
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Awesome Screenshot Plus - Capture, Annotate & More Compatible
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Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and text, blur sensitive info, one-click upload to share. And more!
Tested Versions: 2.4.6
Compatibility Notes: requires SM 2.33 or later
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BetterPrivacy Compatible
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Remove or manage a new and uncommon kind of cookies, better known as LSO's.The BetterPrivacy safeguard offers various ways to handle Flash-cookies set by Google, YouTube, Ebay and others... Latest updates: See bottom link 'version history'!
Tested Versions: 1.68, 1.69, 1.74
Compatibility Notes: Due to TmoWizard also Version 1.69 works fine with SeaMonkey 2.43 on unknown Operating System.
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Blank Your Monitor + Easy Reading Compatible
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BYM: Changes color combination ; left-click in the statusbar for changing its status (ON/OFF) or press Ctrl-Alt-B. ER: Makes text reading easy; select the text, right-click, select the "Easy Read" entry in the context menu or press Ctrl-Alt-Z
Tested Versions: 1.9.11
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BlockSite Compatible
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BlockSite is an extension, which automagically blocks websites of your choice. Additionally, this extension will disable all hyperlinks to these websites, by just displaying the link text without the clicking functionality.
Compatibility Notes: password protection doesn't work
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BlockSite Plus Compatible
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BlockSite, improved and bugless. Try the companion mobile firefox extension BlockSite Plus mobile.
Tested Versions: 1.1
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Bottom Error Console Compatible
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Displays The build in Error Console in the bottom of Browser window.
Tested Versions: 0.3.4, 0.3.4.1-signed
Compatibility Notes: On AMO tagged as not available for SeaMonkey, Bottom Error Console 0.3.4.1-signed works fine for me after conversion with English SeaMonkey 2.45a1 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 Build 20160308001946 (Default Classic Theme) on German WIN7 64bit
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Browsec VPN Not compatible
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Encrypts traffic and unlocks sites. Facebook closed by an overzealous sysadmin? Browsec to the rescue! Browsec encrypts your traffic and routes it through our secure cloud. No one will be able to identify, track you or sniff your traffic.
Tested Versions: 2.0.3
Compatibility Notes: On AMO tagged as not available for SeaMonkey, unknown version of add-on does NOT work after conversion with unknown SeaMonkey version on unknown Operating system due to kmike: no toolbar button appears and no IP change
Cache Status Compatible
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Easy cache status & management from status...
Tested Versions: 0.8.5
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CanvasBlocker Compatible
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Blocks the JS-API for modifying <canvas> to prevent Canvas-Fingerprinting.</canvas>
Tested Versions: 0.1.6-Release
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Capture & Print Compatible
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This add-on lets you print a webpage's area easily.
Tested Versions: 0.1.9.2
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Check4Change Compatible
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Check4Change (aka C4C) is a simple extension that allows you to select a part of a web-page, and get notified when it changes.
Tested Versions: 1.9.8.3
Compatibility Notes: Converted Add-On installs and works fine with unzipped installer of officialen-US SeaMonkey 2.53a1 (NT 6.1; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 Build 20170706013410 (Default Classic Theme) on German WIN7 64bit
(but I did only very few tests)
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ChromaTabs Mostly compatible
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Tints browser tabs with a color specific to the website loaded. This helps you identify tab contents based on a distinct visual cue.
Tested Versions: 2.0
Compatibility Notes: Be aware this is a very old extension and how well it works may depend on your theme and/or system.
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CipherFox Not compatible
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Displays the current SSL/TLS cipher, protocol and certificate chain in the Add-on bar and Site ID dialog
Tested Versions: 3.10.0
Classic Opera Not compatible
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Brings a few (mostly tab related) features from older versions of Opera to Firefox.
Tested Versions: 1.5
Close Button Mostly compatible
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Adds a Close Tab (or Window, or Browser) button to the toolbar, so you can put it where you want it. The appearance follows your current theme.
Tested Versions: 0.4.1
Compatibility Notes: when close button is set to close tab then it will not close window when there are no more tabs, regardless of settings
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Close Tabs to the Right Not compatible
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Add "Close Tabs to the Right" menu to tab context menu. Project is available on github, https://github.com/yukihr/CloseTabsToTheRight-FirefoxExtension .
Tested Versions: 0.1.9
Compatibility Notes: You may be interested in converting RemoveTabs.
Color Transform Compatible
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Adapt page colors to your taste or need. Save your favorite color scheme for automatic coloration. Comes with 18 predefined themes and 24 basic transforms for hue, saturation, lightness and opacity. For Firefox 24.0 and above.
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CoLT Compatible
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CoLT (short for "Copy Link Text") makes it easy to copy either a link's text, or both the link text and its URL in a format you specify. This non-invasive extension simply appears as context menu items when you right-click a link. Fully customizable!
Tested Versions: 2.6.4
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Compact Menu 3 - Blue Not compatible
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Compatibility Notes: Some minimal functionality exists like being able to make the menu smaller, however other things are broken.
Config Descriptions Compatible
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Shows source comments for advanced application preferences in about:config
Tested Versions: 1.0.1-signed
Compatibility Notes: On AMO tagged to be "Not available for SeaMonkey 2.39", works fine after conversion due to DERoss on unknown Operating system
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Cookie Monster Compatible
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Cookie Monster provides proactive cookie management on a site or domain level basis, including 3rd party cookies. Via the status bar, it provides easy access to enhanced cookie functionality, while doing so in a non-intrusive manner.
Tested Versions: 1.2.0
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Coprolalia Compatible
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Coprolalia will insert swearwords into the text of all web pages you visit. It's compatible with all versions of Firefox! It only works with English web pages. Note: Coprolalia is also available for Chrome. Get it at https://goo.gl/IJy3hO
Tested Versions: 1.0
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Copy Title Compatible
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Adds a "Copy Title" menu item to the pop-up menu. This puts the current page title on the clipboard. CTRL-V to pase.
Tested Versions: 1.1.1-signed.1-signed
Compatibility Notes: Due to user grahamperrin's posting on Firefox & Thunderbird Add-on Converter for SeaMonkey (2017-11-18)  this add-on installed and works fine for SeaMonkey with unknown Version, OS and language/localization
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Copy Title and URL Not compatible
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This addon will provide a way to copy title and url by using menu and context menu.
Tested Versions: 1.0
Compatibility Notes: Due to user grahamperrin's posting on Firefox & Thunderbird Add-on Converter for SeaMonkey (2017-11-18)  this add-on is NOT compatible with SeaMonkey with unknown Version, OS and language/localization. It's unknown which problems make it incompatilbe (installation fails? UI damaged? Does not work?)
Custom Tab Width Compatible
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Lets you customize the minimum and maximum tab width.
Tested Versions: 1.0.1.1-signed
Compatibility Notes: Note: this extension will not restore default widths on disabling or uninstallation.
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Cute Xdebug Not compatible
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Adds toolbar buttons for enabling/disabling Xdebug debugging and profiling.
Tested Versions: 1.0.3
Dafizilla ViewSourceWith Compatible
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The main goal allows users to open (and in some cases edit) page source with external applications.
Tested Versions: 0.9.4.3.1-signed
Compatibility Notes: View Source With menu does not work in Mail Compose window - but it's hard to treat it as an error because this extension is not event meant to work in SeaMonkey Mail or Thunderbird. However, in Mail Messenger windows the menu is functional.
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Default FullZoom Level Not compatible
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Set Default FullZoom Level, Toolbar buttons for Page zoom and Text zoom.
Tested Versions: 7.4.1-signed
Compatibility Notes: SM2.35, SM 2.38, SM 2.39 (WIN7 64bit Build 20151103191810), SM 2.41a1 (Linux 64bit Build 20151029003002):
Browser [Back] icon in browser navigation toolbar will no longer work if add-on is installed and active.
'Tools → Add-ons-Manager → [Preferences]' shows XUL error
DictionarySearch (Official Version) Compatible
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Looks up a user selected word in an online...
Tested Versions: 28.0.0.1-signed
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Dir Up Compatible
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Go up directory structure by click and key.
Tested Versions: 1.0.17
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Disable DHE Compatible
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Disables ephemeral Diffie-Hellman cipher suites that are vulnerable to the logjam attack.
Tested Versions: 0.1.1
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Disconnect Compatible
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Make the web faster, more private, and more secure.
Tested Versions: 3.15.3.1
Compatibility Notes: On AMO tagged as not available for SeaMonkey, Disconnect [converted] 3.15.3.1-signed.1-signed  installs without problems and works fine with English SeaMonkey (unknown Version) on Kubuntu 14.04(?) due to Michael Speier
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Domain Details Compatible
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Displays Server Type, Headers, IP Address, Location Flag, and links to Whois Reports. Shows links to check server status and cache when page fails to load.
Tested Versions: 2.7
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Double Click Closes Tab Compatible
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The fastest (yet safe) addon to close tab using mouse only! Close any tab by double clicking the tab. Close current tab by triple click anywhere on the page. Optionally middle click or double right click on page to close tab.
Tested Versions: 0.27
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Download Manager (S3) Not compatible
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View and manage downloads from a tidy statusbar This is a new life in Firefox 26+ for old well-known addon Download Statusbar New Features: Replace Downloads Library page. Now you have full control of your downloads history!
Tested Versions: 3.05
Drag & DropZones Compatible
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Get rid of that clumsy context menu, and search the web using up to 100 stylish Drag & DropZones
Tested Versions: 1.6.1
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DragNDrop Toolbars Compatible
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Your toolbars become Drag and Droppable ...
Tested Versions: 0.0.0.9
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Easy Copy Compatible
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Copy links to a page with one click, ready to paste anywhere else, eg. emails, blogs, forums and Twitter. Copy a single page, all open tabs or all links on a page.
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easy Xdebug Mostly compatible
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This addon was built to make debugging while using netbeans PHP easier.
Compatibility Notes: SM support is formally included but this add-on is very old and will benefit from conversion. There are some js errors in console but they seem to be harmless.
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easy Xdebug (with moveable icon) Not compatible
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set debug cookies (eg $cookie[XDEBUG_SESSION]='netbeans-xdebug') on your localhost, to enable remote debugging in eclipse/netbeans. redo of 'easy Xdebug' +moveable icons (eg. to bookmarkbar) +refreshes the icons on tab change +config cookies
easyGestures N Partially compatible
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A fully customizable pie menu for browsing the Web from where your cursor is located; a fork of easyGestures 4.3.2.
Tested Versions: 4.7
Compatibility Notes: Most configurations work but there are a few actions that do not. This extension is made for a very old version of SM and will hence benefit from conversion.
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EHTip Compatible
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Word translation in tooltip with English⟷Croatian dictionary already incorporated.
Tested Versions: 2.4.4
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Empty Cache Button Compatible
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Cache clearing made easy. One click.
Compatibility Notes: Only avaliable from Classic Add-ons Archive
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ErrorZilla Plus Compatible
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This extension is a replacement of Firefox official error page, which adds some useful tools to aid your troubleshooting. The tools include: - Google Cache (view the page cached by Google) - Coralize (use Coral CDN proxy to connect again) - Wayback (view an earlier version of this page) - Ping (use a server to ping the target server) - Trace (trace the network route from you to the server) - Whois (look up who owns the website) - Proxify (use your custom web proxy to connect)
Tested Versions: 1.2.3
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Exit Button Firefox Compatible
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Adds a toolbar button to exit Firefox...
Tested Versions: 0.4.2
Compatibility Notes: Note: this and Exit Button Thunderbird will not cooperate together so choose only one.
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Expire history by days Compatible
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Allows to expire history older than a fixed amount of days.
Tested Versions: 1.2.0
Compatibility Notes: On AMO tagged as not available for SeaMonkey, version 1.2.0 of add-on works fine after conversion with unknown SeaMonkey version on unknown Operating system due to DERoss 
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Extended Statusbar Not compatible
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A Statusbar with speed, percentage, time and loaded size (similar to Opera's one)
Tested Versions: 2.0.3
Fast Dial Partially compatible
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Visual bookmarks for Firefox. (Works with all latest versions of Firefox)
Tested Versions: 4.12
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Fire Commander Compatible
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Two-pane file manager
Tested Versions: 0.3.10
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fireform Compatible
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A simple yet configurable form filler. Includes support for multiple profiles and custom field names. Localized for English, Français (French), limba română (Romanian) and русский язык...
Tested Versions: 0.7.5
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FireGestures Not compatible
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A customizable mouse gestures extension which enables to execute various commands and user scripts with six types of gestures.
FireTitle Compatible
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Label your Firefox browser windows with mnemonic titles. Find the Firefox window you're looking for, fast...
Tested Versions: 0.5.5-1
Compatibility Notes: Due to user grahamperrin's posting on Firefox & Thunderbird Add-on Converter for SeaMonkey (2017-11-18)  this add-on installed and works fine for SeaMonkey with unknown Version, OS and language/localization.
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Flashblock Mostly compatible
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Never be annoyed by a Flash animation again! Blocks Flash so it won't get in your way, but if you want to see it, just click on...
Tested Versions: 1.5.19a1
Compatibility Notes: Some problems with blocking YouTube HTML5 videos - see this discussion. Version 1.5.19a1 is still better than the official one.
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FlashStopper Not compatible
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Stops flash autoplay and shows the video preview thumbnail.
Tested Versions: 1.2.8
FlipClock Compatible
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A stylized clock add-on for the status bar with a variety of display options, including flip clock, nixie clock, LED clock, and LCD clock.
Tested Versions: 0.82.1-signed
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Font Finder Partially compatible
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FontFinder is created for designers, developers and typographers. It allows a user to analyze the font information of any element on a page, copy any piece(s) of that information to the clipboard, and perform inline replacements to test new layouts.
Tested Versions: 1.1.1
Compatibility Notes: This addon apparently supports some ancient versions of SeaMonkey but not the current ones. Convert with default options (despite warning) and it will work fine. Warning: using "analyze selection" from context menu more than once crashes the browser.
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fontinfo Partially compatible
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Provides tools to find out details of the fonts used in a web page.
Compatibility Notes: Page Info window will be a bit broken - convert without porting Page Info features (in options) to keep right-click context menu feature only without breaking Page Info. You may also be interested in converting Font Finder.
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Force Content-Type Mostly compatible
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An extension to force the Content-Type of URLs...
Tested Versions: 1.2.2.1-signed
Compatibility Notes: Context menu on the status bar icon may lack background.
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Free Memory Not compatible
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An add-on to perform free-memory operations without visiting about:memory.
Tested Versions: 0.95
Full Web Page Screenshots (♥♥♥♥♥) AKA FireShot Not compatible
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FireShot makes full web page screenshots. Demo: http://bit.ly/RlBQMV Screenshots can be quickly captured and: ― Saved as Image or PDF ― Sent to clipboard ― Printed ― Annotated * ― Uploaded * ― E-Mailed * * OS Windows only
Tested Versions: 0.98.85
Compatibility Notes: Generally Add-On-version0.98.85 works fine for mewithout any conversion on WIN for officially released SeaMonkey versions. For later Versions (I tested with English SeaMonkey 2.45a1 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 Build 20160308001946 (Default Classic Theme) on German WIN7 64bit) adaption of maxVersion from '2.40.*' to '2.*' in "install.rdf" is required (the Add-On-Converter does the job)
FxKeyboard Compatible
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A virtual keyboard for Firefox. Adds a keyboard to the bottom of the window. Usefull for touchscreens or kiosks setups.
Tested Versions: 2.4.2
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Ghostery Not compatible
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Protect your privacy. See who's tracking your web browsing and block them with Ghostery.
Tested Versions: 6.2.0
Compatibility Notes: On AMO tagged as available until outdated SeaMonkey 2.36 (max). Does not work at all for me with English SeaMonkey 2.45a1 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 Build 20160308001946 (Default Classic Theme) on German WIN7 64bit: No ghostery Icon apears, preferences Ghostery page does not recognize installed Ghostery.
Possible Alternative: Disconnect
Ghostery 5.4.2 probably supported SeaMonkey 2.32
Google Translator for Firefox Compatible
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With this addon you can translate any text to your own language with one click or hot-key. You can either translate the selected text, this way the translated text will overwrite the original selected text, or you can translate the full page too.
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Googlebar Lite Partially compatible
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A light-weight Google search toolbar for Firefox. Offers 14 search types, Google search suggestions (in 5.0+), search history auto-completion, a customizable toolbar, search word highlighting, and more.
Tested Versions: 5.0.6.1-signed
Compatibility Notes: Find next occurrence fails. Search history dropmarker does not work. Search history dropmarker does not disappear after disabling search history, it will highlight all the matching words in a page, though. Read more in this discussion.
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GrabMyBooks Compatible
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Grab content from web sites and feeds into an ePub / mobi file for your eBook reader. Create your own newspapers with news from all over the world.
Tested Versions: 1.8.2
Compatibility Notes: On AMO tagged to be "FF only", works fine after conversion due to marias on unknown Operating System (ubuntu?)
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Greasemonkey Mostly compatible
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Customize the way a web page displays or behaves, by using small bits of JavaScript.
Tested Versions: 2.3, 3.0, 3.8
Compatibility Notes: Default script editor is not available - set up external editor in options to make the edit function work*. Otherwise it appears to work. You can also consider Scriptish, a GM fork, which supports SeaMonkey natively (use "Install Anyway" button if it appears as not available for SeaMonkey). Another alternative: Greasemonkey Port.

*Update: In SeaMonkey 2.45 and later the developer tools are included therefore the internal editor will work (because it uses the Scratchpad, which is part of dev tools). No need to set up external editor. Therefore, Greasemonkey appears to be fully compatible.
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History Submenus Not compatible
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This places each day's entire browsing history in a submenu of the history menu.
Tested Versions: 2.10
History Submenus II Not compatible
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Add sub-menus to History Menu for previous days' history.
Tested Versions: 2.3.8
I don't care about cookies Mostly compatible
#
Get rid of annoying cookie warnings from tens of thousands of 'infected' websites!
Tested Versions: 2.3.5
Compatibility Notes: Right-click menu entry "Report a cookie warning" does not work.
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Image Picker Compatible
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Pick images while you browse. Choose (filter) images and save images from web page to local disk.
Tested Versions: 1.9.3
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Image Resizer/Scaler Not compatible
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Simply resize/scale any images on the web by dragging an image! Live demo: http://eliotvu.com/apps/image_resizer_demo
Tested Versions: 1.6
Image Toolbar Compatible
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Single-click access to common actions for images (e.g. saving, copying, printing). This extension is intended to provide a replacement for the equivalent toolbar in Internet Explorer.
Tested Versions: 0.6.15
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ImTranslator - Google Translator, Dictionary, TTS Compatible
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MORE THAN 22 MILLION DOWNLOADS ImTranslator provides translation powered by Google Translate, Microsoft, Babylon for 70+ languages. It includes Translator, Dictionary, Text-to-Speech, Back Translation. Video Tutorial: http://youtu.be/qyLyFkQuMGU
Tested Versions: 8.3
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Informational Tab Not compatible
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Provides thumbnail, progress meter, or others to each tab.
Tested Versions: 0.5.2014100302
Inspect Context Compatible
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Open Dom Inspector at this node from Inspect on context menu. Dom Inspector must already be installed. Handy for checking both page for web developers and chrome for extension...
Tested Versions: 1.00
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Just Disable Stuff Compatible
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Just disable JavaScript - toggle it on and off. No fancy toolbars, icons, windows, unnecessary functions. Just do it. You can also disable images. And CSS. And multimedia. Just like that. If You're night owl, Your eyes will love Night Mode.
Tested Versions: 1.1
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Key config Partially compatible
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This add-on provides configurable keyboard shortcuts for several actions and a dialog to customize them. All shortcuts can be redefined in Tools -> Key settings
Tested Versions: 0.3.1.1-signed
Compatibility Notes: Most configurations work but there are a few actions that do not. This extension is made for a very old version of SM and will hence benefit from conversion.
Convert for SeaMonkey »
Konquefox Compatible
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Konquefox is an extension for Mozilla Firefox that adds some useful buttons : Clear URL, Clear Search field, Go Up and Zoom, for a better integration in Linux or KDE
Tested Versions: 1.8.2
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LEO Dictionaries Compatible
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This is the official add-on for easier access to LEOs Online Dictionaries. Select any word or phrase, right-click on the selection and translate from/to English, French, Spanish, Italian, Chinese, Russian, Portuguese and Polish to/from German.
Tested Versions: 2.0.0.1-signed.1-signed
Compatibility Notes: On AMO tagged as not available for SeaMonkey, LEO Dictionaries [converted] 2.0.0.1-signed.1-signed installs without problems and works fine for me with English SeaMonkey 2.45a1 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 Build 20160308001946 (Default Classic Theme) on German WIN7 64bit.
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Lightbeam for Firefox Not compatible
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Lightbeam is a Firefox add-on that enables you to see the first and third party sites you interact with on the Web. Using interactive visualizations, Lightbeam shows you the relationships between these third parties and the sites you visit.
LiveClick Mostly compatible
#
Adds feed reading, notifications, favicons, and other enhancements to Live Bookmarks.
Tested Versions: 1.0.1
Compatibility Notes: When live bookmarks are added to bookmarks toolbar then this extension will not work in most cases. However, it will work fine in the bookmarks menu.
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Long URL Please Mod Compatible
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This is an extension of the original Long URL Mod which will resolve much more ShortURL Services, even some of the hard extractable services like cli.gs. Currently 182 short URL services are supported
Tested Versions: 0.5.1.1-signed
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Magnifier Not compatible
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A quick restartless magnifier to debug styles and web pages.
Tested Versions: 0.6
Memory Restart Partially compatible
#
Gives you a quick way to restart if memory usage is too high.
Tested Versions: 1.18
Compatibility Notes: Generally appears to work, however after the selected memory limit is reached it starts throwing js errors in console, hence this extension may have some hidden issues in SeaMonkey.
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Menu Icons Plus Partially compatible
#
Adds icons to your Firefox menus. Choose from the built-in icon sets or import your own.
Tested Versions: 3.0
Compatibility Notes: works but because menu items in Firefox don't always overlap with those in SM not all of them will get an icon
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Menu Mod Partially compatible
#
Adds many options to modify the Firefox menus. Presently...
Tested Versions: 2.2
Compatibility Notes: option to display menus as one letter doesn't work; an error in console shows up - test if this addon doesn't break anything else
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microGesture Compatible
#
Ultra Compact Mouse Gesture Extension.
Tested Versions: 1.0
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microGesture Tab Edition Compatible
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Ultracompact Mouse Gesture Extension. Special Tab control Edition.
Tested Versions: 1.0
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Modify Headers Compatible
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Add, modify and filter the HTTP request headers sent to web servers. This addon is particularly useful for Mobile web development, HTTP testing and privacy.
Tested Versions: 0.7.1.1
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Modify Response Headers Compatible
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Add, modify and filter HTTP response headers
Tested Versions: v0.7.1.1_response_v1.05.1-signed
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Navigate Up Compatible
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Navigate up one or more URL levels, by clicking on icon in URL bar, or using icon's context menu, or pressing shortcut key.
Tested Versions: 2.6
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Navigational Sounds Compatible
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A simple extension that plays the Windows Internet Explorer start and end navigation sounds, popup blocked and information bar sounds, feed and search provider discovered sounds, and download completed sound.
Tested Versions: 1.2.4.1-signed
Compatibility Notes: Tested on Windows XP with SeaMonkey 2.33.1. Windows 8+ users will need to assign the "Start Navigation" sound.
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New tab toolbar button Compatible
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Adds a toolbar button which opens a new blank tab when clicked.
Tested Versions: 1.1
Convert for SeaMonkey »
NewScrollbars (aka NoiaScrollbars) Compatible
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The "NewScrollbars"-extension replaces the default scrollbars of Firefox and Thunderbird with colorized ones (partly) known from "Noia themes". Firefox 32 zoom bug with custom scrollbars got fixed in Firefox 33 beta 6, Aurora and Nightly!
Tested Versions: 1.2.2
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Noise Control Partially compatible
#
Shows an icon in the tab of each tab currently playing an HTML5 video or audio. Clicking on the icon mutes the videos/audio. This feature has been implemented in Firefox Nightly builds, but you can have it now.
Tested Versions: 12
Compatibility Notes: Does not detect Flash, otherwise works fine for html5 audio.
Convert for SeaMonkey »
Norwell History Tools Compatible
#
Norwell reveals the history that is otherwise hidden from you in native firefox history viewer. Displays all browsing history chronological/sequentially as timeline. Advanced search, wildcards and filters. Chrome and Firefox history import tool.
Tested Versions: 1.9.1
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NoSquint Partially compatible
#
NoSquint allows you to adjust the text-only and full-page (both text and images) zoom levels as well as color settings both globally (for all sites) and per site.
Compatibility Notes: Only some of the features work in SeaMonkey. See this discussion on how to hack NoSquint for better compatibility.
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Notepad (QuickFox) Compatible
#
Everyday note-taking solution.
Tested Versions: 2.8.4
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Omnibar Not compatible
#
Integrates location bar and search bar into one. Shows search and url suggestions. Quickly switch search engine using search keywords. Provides different auto-complete popup styles for compact displays.
Tested Versions: 0.7.28.20141004
Open Bookmarks in New Tab Not compatible
#
After you installed this addon to your Firefox, bookmarks are opened in new tab always.
Organize Status Bar (Revived) Compatible
#
This extension will enable you to organize your status bar icons. You can now rearrange or remove any item (icon or text) in the Firefox status bar. If your status bar is full and cluttered like mine was, give this a try. ...y5
Tested Versions: 0.1.0
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Page Zoom Button Compatible
#
Zoom in, zoom out, and reset page zoom with one toolbar button (saves toolbar space). Zoom by clicking on the button, or by rolling the mouse wheel.
Tested Versions: 1.4.1
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pdfit Compatible
#
PdfIt extension allows user to convert current page to image file, or PDF format(image to pdf), during the page to image conversion process, user can apply some image filters( for example,rotate,reflection...,)
Tested Versions: 1.15
Compatibility Notes: Due to user grahamperrin's posting on Firefox & Thunderbird Add-on Converter for SeaMonkey (2017-11-18)  this add-on installed and works fine for SeaMonkey with unknown Version, OS and language/localization.
Convert for SeaMonkey »
Pearl Crescent Page Saver screenshot tool Compatible
#
Save an image of a web page (including Flash content) to a file. Web page screenshots may be captured interactively or from the command line. Options allow you to control the output format (PNG or JPEG), image file name, scaling, and much more.
Tested Versions: 2.8.2
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Personal Menu (Personal Firefox Button) Not compatible
#
Bring back your personal and powerful Firefox Button!
Tested Versions: 6.2.0
ProfileSwitcher Compatible
#
It adds some options to launch easily other profiles and the Profile Manager.
Tested Versions: 1.6.2
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Progre Partially compatible
#
Combine URL bar and progress bar.
Tested Versions: 1.0.2
Compatibility Notes: caveat: this extension will prevent "Paste & Go" context menu item from appearing
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QR Code Image Generator Not compatible
#
Create a QR Code of the selected text or current URL. Use CTRL-SHIFT-Q to quickly see the QR Code. Also possible to create a QR Code from free text within Firefox. Works completely offline! Now with UTF8 support.
QrCodeR Not compatible
#
Encode selection, links and images to QrCode with right-click.
QuickImage Compatible
#
Allow, block or prevent third-party images from loading via button in the Status Toolbar or alternatively add a button to the Navigation Toolbar.
Tested Versions: 1.4.1.1-signed
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QuickRestart Compatible
#
Ever needed to restart Firefox after enabling or disabling an extension, switching to a new theme, or modifying configuration files (such as userChrome.css or user.js)? This simple extension adds a "Restart Firefox" item to the "File" menu. You can also use the Ctrl+Alt+R keyboard shortcut, or the included toolbar button.
Tested Versions: 1.1.6
Compatibility Notes: Due to TmoWizard also Version 1.1.6 works fine with SeaMonkey 2.43 on unknown Operating System.
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QuickWiki Mostly compatible
#
Quick lookup in Wiktionary and Wikipedia, without the need to open a new tab. Just right-click a word while shift / ctrl / alt is pressed.
Compatibility Notes: works but there are some js errors in console
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Reddit Enhancement Suite Not compatible
#
NOTE: Reddit Enhancement Suite is developed independently, and is not officially endorsed by or affiliated with reddit. RES is a suite of tools to enhance your reddit browsing experience.
Compatibility Notes: On AMO tagged with "FF only", unknown add-on-version did not work after conversion due to dmellem with unknown SeaMonkey version on unknown Operating System.
ReloadEvery Mostly compatible
#
Reloads web pages every so many seconds or minutes. The function is accessible via the context menu (menu you get when you right click on a web page) or via tab context menu (right click on the tab)
Compatibility Notes: works but context menu on tabs doesn't appear
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Remove It Permanently Partially compatible
#
Permanently hide content from web pages using the Context Menu. Simply, click and "Remove it Permanently". Now includes previewing of items before removal, support for IFrame as well as lots of advanced features to make it easy for...
Tested Versions: 1.0.6.10
Compatibility Notes: status bar icon doesn't show up and can mess up items positioned to either side, but all other features seem to work
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RemoveTabs Compatible
#
Remove tabs on the left/right side of selected one.
Tested Versions: 0.5.0.3
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Resurrect Pages Compatible
#
Dead pages, broken links, the scourge of the internet. Powerhouse sites like Slashdot and Digg can bring a server to its knees. What do we do when a page is dead but we still want to see it? Call in the clerics, and perform a resurrection...
Tested Versions: 2.0.6
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Save Images Compatible
#
Save Images saves the images from the current tab page, from the cache, to a specified location, with either the images original file name or a file name that you specify. The size and types of images saved may be chosen, with options if...
Tested Versions: 1.1.0
Compatibility Notes: This extension appears to be adapted to SM and can be installed without conversion but still the conversion helps with some minor issues.
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ScrapBook Mostly compatible
#
Helps you to save Web pages and organize the collection.
Tested Versions: 1.5.13.1-signed
Compatibility Notes: Toolbar button and extension menu items do not open sidebar - open sidebar normally with F9.
Convert for SeaMonkey »
Scroll Highlight Not compatible
#
Highlights previous scroll position.
Tested Versions: 0.4.1-signed.1-signed
Compatibility Notes: Due to user grahamperrin's posting on Firefox & Thunderbird Add-on Converter for SeaMonkey (2017-11-18)  this add-on is NOT compatible with SeaMonkey with unknown Version, OS and language/localization. It's unknown what problems make this add-on unusable.
Scroll Position Highlight Not compatible
#
Highlights previous scroll position
Tested Versions: 1.9
Compatibility Notes: Due to user grahamperrin's posting on Firefox & Thunderbird Add-on Converter for SeaMonkey (2017-11-18)  this add-on is NOT compatible with SeaMonkey with unknown Version, OS and language/localization. It's unknown what problems make this add-on unusable.
Scrollmap Compatible
#
Replaces vertical scrollbar with scrollable minimap.
Tested Versions: 0.9.1-signed.1-signed
Compatibility Notes: Due to user grahamperrin's posting on Firefox & Thunderbird Add-on Converter for SeaMonkey (2017-11-18)  this add-on installed and works fine for SeaMonkey with unknown Version, OS and language/localization.
Convert for SeaMonkey »
Search by Image for Google Compatible
#
Google Search by Image: Use rightclick on an image to quickly find out the source of an image, how it is used, or find higher resolution versions via Google Reverse Image search. (Google Image Search is similar to Tineye Reverse image search).
Tested Versions: 1.2.0, 1.2.0.1-signed
Compatibility Notes: Version 1.2.0.1-signed works fine with en-US SeaMonkey 2.40 final, Mozilla/5.0 (Windows NT 6.1; WOW64; rv:43.0) from official download page, Gecko/20100101 Firefox/ 43.0 Build 20160120202951, (Default Classic Theme) on German WIN7 64bit
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Search Highlight Compatible
#
Lets you highlight search bar keywords in the current page via the context menu.
Tested Versions: 1.0.1
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Search Site Not compatible
#
Search within the current site from the search bar, the new search panel or the context menu. Search within current subdomain or within entire domain. Fully supports the new search panel and search engine buttons.
Tested Versions: 7.0
Compatibility Notes: On AMO tagged as not available for SeaMonkey, the converted add-on installs without problems, but does not work at all with Server-Installation of official en-US SeaMonkey 2.50a1 (NT 6.1; WOW64; rv:53.0) Gecko/20100101 Firefox/53.0 Build 20170110004313 (Default Classic Theme) on German WIN7 64bit.
Search term highlighter Compatible
#
Highlights your search terms in Web pages.
Tested Versions: 7.2
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SearchWP Not compatible
#
Jump-to-word buttons and highlighting for the search box content
Tested Versions: 2.7
Secure Login Compatible
#
Secure Login is an extension for Firefox integrated password manager.
Tested Versions: 1.0.6
Convert for SeaMonkey »
Self-Destructing Cookies Not compatible
#
Fix the web. Gets rid of a site's cookies and LocalStorage as soon as you close its tabs. Protects against trackers and zombie-cookies. Trustworthy services can be whitelisted.
Tested Versions: 0.4.7
Show Password Compatible
#
If you are not worried about someone looking from behind your back and stealing your passwords, why take additional pain for typing **** password fields, where you dont know whether you typed your long password correctly or not
Tested Versions: 1.7
Convert for SeaMonkey »
Shumway Compatible
#
Shumway is an HTML5 technology experiment that explores building a faithful and efficient renderer for the SWF file format without native code assistance.
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Smart Zoom Compatible
#
Simulates the smart zoom of mobile devices and tablets on desktop. Instead of double tapping though, click and hold.
Tested Versions: 2.0
Compatibility Notes: On AMO tagged as NOT available for SeaMonkey. Quick Test: converted add-on works fine for User Rainer Bielefeld with official en-US SeaMonkey 2.48a1 (NT 6.1; WOW64; rv:51.0) Gecko/20100101 Firefox/51.0 Build 20160804000913 (Default Classic Theme) on German WIN7 64bit
SpeechUtil Compatible
#
Allows you to listen the english text, selected in the web-page. Add-on converts selected text into the speech in OGG format. This format has native support by the modern Firefox versions. Try it now. Have Fun and Good Luck.
Tested Versions: 0.3
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Stacked Inspector Compatible
#
Switch DOM Inspector to an over/under vertical layout instead of the usual side-by-side panel layout.
Tested Versions: 1.0.20110524
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Tab Clicking Options Mostly compatible
#
Select actions for various clicking events on a tab or the tab...
Tested Versions: 0.6.9
Compatibility Notes: Works but there is also a version updated to work with SeaMonkey here. Undo close tab action seems to be missing.
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Tab Focus Compatible
#
focus tabs on mouse-over
Tested Versions: 1.0.8
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Tab Groups Not compatible
#
Tab Groups are an easy way to organize a lot of tabs. You can visually group related tabs, switch between groups, and quickly search through all of your tabs to switch to a specific one.
Tested Versions: 2.1.4
Compatibility Notes: Due to user grahamperrin's posting on Firefox & Thunderbird Add-on Converter for SeaMonkey (2017-11-18)  this add-on is NOT compatible with SeaMonkey with unknown Version, OS and language/localization. It's unknown what problems make this add-on unusable.
Tab Mix Plus Not compatible
#
Tab Mix Plus enhances Firefox's tab browsing capabilities. It includes such features as duplicating tabs, controlling tab focus, tab clicking options, undo closed tabs and windows, plus much more. It also includes a full-featured session manager.
Tab Overflow Scrollbar Compatible
#
Adds a horizontal scrollbar below the tab bar when Firefox is in tab overflow mode (more than 10 tabs open) for easier tab navigation. Also gives a vertical scrollbar to the alltabs dropdown menu, when it is required.
Tested Versions: 4.5
Convert for SeaMonkey »
Tab Utilities Not compatible
#
Open Bookmarks/History/Homepage/URL/Search in new tabs, and more utilities for tabbed browsing, including Protect/Lock/Faviconize/Unload Tab, Reload Every, Select and manipulate multiple tabs simultaneously, Tab Stacking/Coloring, etc.
Tested Versions: 1.5.28.1
TabStash Not compatible
#
With one click, collapse all your Firefox tabs to a single, pristine tab. Click again to restore! Inspired by Chrome OneTab. (Warning: this is an experimental alpha release! It does not have many features yet.)
Tested Versions: 0.1
Text to Voice Compatible
#
http://en.wikipedia.org/wiki/Text-to-voice. TTS gives Firefox the power of speech. Select text, click the button on the bottom right of Firefox window and this add-on speaks the selected text for you. Isn't it brilliant? Audio is downloadable.
Tested Versions: 1.10
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Textarea Cache Compatible
#
Save automatically the content in Textarea.
Convert for SeaMonkey »
The easiest Xdebug Not compatible
#
The easiest way to control Xdebug: + set tracing, profiling and remote debugging in one click! + configure your IDE key in addon preferences! + based on Jetpack, so it's restartless + animated icons Installation: http://manual.pohape.ru/xdebug/
Tested Versions: 2.0
Thin Xdebug Not compatible
#
Adds toolbar buttons for switching Xdebug remote debugging and profiling.
Tested Versions: 1.1.1-signed.1-signed
Tiny Menu Compatible
#
Replace the standard menu bar with a tiny menu popup.
Tested Versions: 2.0.4
Compatibility Notes: tip: it appears you can't move the "tiny menu" to other toolbars but you can move items from other toolbars to the the "tiny menu" toolbar therefore ending up with one sleek toolbar that saves space - this works even better than in Fx >= 29 (where location bar seems to be unmovable)
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Toggle animated GIFs Compatible
#
Start/stop GIF animations through a keyboard shortcut or by clicking them. You can also restart animations from the beginning, or disable animations by default.
Tested Versions: 1.2.1
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Toggle Cookies Not compatible
#
Just a button to toggle allowing/disallowing cookies globally
Tested Versions: 0.7.4
Toggle Find Bar Not compatible
#
You can toggle the find bar only with ctrl + F keys.
Tested Versions: 0.2.1
Toolbar Buttons Compatible
#
Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.
Tested Versions: 1.0
Compatibility Notes: this extension supports SeaMonkey natively since version 1.0.1 - no need to convert!
TooManyTabs - Saves Your Memory Not compatible
#
TooManyTabs allows you to store as many tabs as you like by adding extra rows in the Firefox! It saves your browser's space and memory as idle tabs are put aside. The extra rows also help to better prioritize and visualize your tabs.
Tested Versions: 1.4.5
Tree Style Tab Not compatible
#
Show tabs like a tree.
Trusted Shops Add-On für Firefox Not compatible
#
Finden Sie sichere Shops in Ihrer Google-Suche.
Highlights trusted shops in Goolge search results.
Tested Versions: 2.5
Compatibility Notes: Does nothing with unofficial (from <http://seamonkey.callek.net/contrib/>) en-USSeaMonkey 2.44a1 Mozilla/5.0 (Windows NT 6.1; x64; rv:47.0) Gecko/20100101 Firefox/47.0 Build 20160208090255 (Default Classic Theme) on German WIN7 64bit
Turn Off the Lights Compatible
#
The entire page will be fading to dark, so you can watch the video as if you were in the cinema.
Convert for SeaMonkey »
Undo Closed Tabs Button Compatible
#
Tired of going to History -> Recently Closed Tabs just to undo a closed tab? Then this extension is for you! This extension allows you to undo closed tabs via a toolbar button or the right-click context menu.
Tested Versions: 3.9.1
Convert for SeaMonkey »
Unhide Passwords Compatible
#
If you aren't concerned about someone looking over your shoulder and stealing your passwords, why hassle with those obfuscated password fields, where you never know whether you typed your 30 character code correctly or not...
Convert for SeaMonkey »
Update Scanner Not compatible
#
Monitors web pages for updates. Useful for websites that don't provide Atom or RSS feeds.
Tested Versions: 3.3.2
Compatibility Notes: Update Scanner 3.3.2 Converted Add-On installed, but did NOT work with unzipped installer of officialen-US SeaMonkey 2.53a1 (NT 6.1; WOW64; rv:56.0) Gecko/20100101 Firefox/56.0 Build 20170706013410 (Default Classic Theme) on German WIN7 64bit:
With rightclick on a Web Page I can select that I want to observe this particular page, but next right click again shows the default settings, not mine. Additionally, the described toolbar does not appear. So: DOES NOT WORK
URL n Extension Block(UnE Block) Partially compatible
#
Blocks URLs , Stop Downloads Bad Extensions and locks down Firefox Settings.... Lock down bookmarks/addons/downloads with a password.............Any Many More...
Tested Versions: 2.9.20.1-signed
Compatibility Notes: Only some of the blocking options work in SeaMonkey.
Convert for SeaMonkey »
URL Tooltip Compatible
#
Display URL in hyperlink tooltips.
Tested Versions: 1.2.2
Convert for SeaMonkey »
Version Number in Add-ons Manager Compatible
#
Easily viewable version info in the Firefox Add-ons Manager on Firefox 32.0 and later. Also restores the add-on version number on Firefox 40.0 and later.
Tested Versions: 1.04
Compatibility Notes: You may also try Add-ons Manager - Version Number, which works in SeaMonkey without conversion.
Convert for SeaMonkey »
Video Downloader professional Compatible
#
- download and save videos embedded into a website to your hard disk - add youtube, vimeo and other videos easily to your video list - supports up to 4k videos
Tested Versions: 1.97.36, 1.97.37.1-signed
Compatibility Notes: Due to TmoWizard also Version 1.97.37.1-signed works fine with SeaMonkey 2.43 on unknown Operating System.
Convert for SeaMonkey »
Video Resumer Compatible
#
Automatically resumes YouTube videos from where you played them last. Without this extension, for example, when you click through YouTube videos, back and forth, they always start from the beginning.
Tested Versions: 1.1.3
Convert for SeaMonkey »
Video WithOut Flash Compatible
#
Watch videos without flash
Tested Versions: 1.4.2
Convert for SeaMonkey »
Wappalyzer Compatible
#
Wappalyzer is a browser extension that identifies software on websites.
Tested Versions: 3.0.15
Compatibility Notes: requires SM 2.33 or later
Convert for SeaMonkey »
Web of Trust, WOT: Website Reputation Ratings Compatible
#
Find out which websites you can trust. WOT adds intuitive traffic light-style icons next to search results and URLs so you can decide whether to visit a site: • Green – The site is trusted • Yellow – Be cautious • Red – Online threats detected
Compatibility Notes: SeaMonkey is supported since version 20150421 - no need to convert.
There is a suspect that WOT spies out users and sells user data without anonymization, for details see this video in German language.
Web2PDF Converter Compatible
#
Web2PDF converter allows to convert web pages into PDF files directly from browser. It uses Web2PDF online service.
Tested Versions: 1.12.1-signed
Convert for SeaMonkey »
WheelClear Compatible
#
Clear fields anywhere with the mousewheel
Tested Versions: 2.1.1-signed
Convert for SeaMonkey »
YouTube Flash Player Not compatible
#
A very lightweight add-on that allows you to watch YouTube™ videos using Flash® Player instead of the default HTML5 player. The Flash® Player will consume less material resources (CPU, RAM) if your PC doesn't easily support HTML5 videos. Try it!
Tested Versions: 1.6.2
Compatibility Notes: On AMO tagged as not available for SeaMonkey,YouTube™ Flash® Player [converted] 1.6.2 installs without problems, but does NOT work for me after conversion with English SeaMonkey 2.45a1 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 Build 20160308001946 (Default Classic Theme) on German WIN7 64bit: Videos like this one still show „About rhe HTML5 player“ after right click on this video. Alternative: YouTube Flash Video Player
YouTube Flash Video Player Compatible
#
YouTube Flash Video Player is a powerful tool that will let you choose Flash video player as default YouTube video player. Very useful for veteran Computers which have problems with HTML5 player.
Tested Versions: 45.1
Compatibility Notes: Add-On-version 45.1 works fine for mewithout any conversion with English SeaMonkey 2.45a1 (Windows NT 6.1; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 Build 20160308001946 (Default Classic Theme) on German WIN7 64bit
Convert for SeaMonkey »
YouTube mp3 Not compatible
#
Adds a download button to YouTube. By clicking on it you can download the video as a high quality mp3 file.
Tested Versions: 1.0.9
Compatibility Notes: Does not work with SeaMonkey 2.53 2019-06-22 for Rainer Bielefeld. Compatibility issues or service has become shut down for legal issues?
Zoomr Compatible
#
Simulates the smart zoom of mobile devices and tablets on desktop. Instead of double tapping though, click and hold to zoom on a paragraph, image, etc.
Tested Versions: 1.1
Convert for SeaMonkey »
Zotero Mostly compatible
#
The Next-Generation Research Tool. Zotero for Firefox lets you capture and organize all your research without ever leaving the browser.
Tested Versions: 4.0.28.3
Compatibility Notes: The toolbar button does not work - set up keyword shortcuts (that do not clash with built-in SeaMonkey shortcuts) to access functions that would have been available from the toolbar like "Save to Zotero". Installation: copy the xpi link from the installation page to the converter.

Thunderbird extensions

Address Move Button Compatible
#
Allow you to add a Address Move Button to mail compose window.
Convert for SeaMonkey »
Archive This Not compatible
#
Provides keyboard shortcuts for filing messages into nine configurable "favorite" folders using user-defined keys. Also provides a simple filter system with a keyboard shortcut to file the currently selected message(s) into the correct folder.
AttachmentExtractor Mostly compatible
#
Extracts all attachments from selected messages and then can delete, detach or mark-read.
Compatibility Notes: Some errors in console but seems to work fine.
Convert for SeaMonkey »
Auto Address Cleaner Compatible
#
Removes comment, display name automatically from addresses before sending mail.
Convert for SeaMonkey »
AutoarchiveReloaded Not compatible
#
Automatically archives old mails (Improved version of the orginal Autoarchive Add-on)
Blinking Alert Not compatible
#
Adds blink feature to the new-mail alert. You can also disable auto-hiding of the alert.
Calendar Tweaks Compatible
#
Allows several tweaks to the Thunderbird/Lightning calendar user interface including new selection styles and repeating event icons. Mimics the colors and styles found in MS Outlook.
Tested Versions: 6.2, 6.3
Compatibility Notes: On AMO tagged with "TB only", add-on version 6.3 works fine after conversion due to dlangton on unknown Operating System with unknown SeaMonkey version.
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Change quote and reply format Mostly compatible
#
Tested Versions: 0.8.6
Compatibility Notes: There's a tiny glitch at the reply button, see this post for a workaround.
Convert for SeaMonkey »
Check Domain Compatible
#
This extension is to display the warning dialog when you send mail for multiple domains.
Convert for SeaMonkey »
Color Folders Not compatible
#
Color your Folder Treeview Icons!
Confirm-Address Compatible
#
Confirm E-mail address before sending mail
Convert for SeaMonkey »
Custom Address Sidebar Not compatible
#
Allow you to help address sidebar more useful.
Disable DragAndDrop (Thunderbird) Compatible
#
A Thunderbird extension which disables drag and drop in the folder pane. This extension prevents unintended folder movement.
Convert for SeaMonkey »
Display Mail User Agent Compatible
#
Displays icon for user agent of received mails.
Tested Versions: 1.7.0
Compatibility Notes: On AMO tagged with "TB only", unknown version of the add-on (probably 1.7.0)  works fine after conversion due to dlangton on unknown Operating System with unknown SeaMonkey version
Convert for SeaMonkey »
Display Quota Compatible
#
This extension will display the current status of your IMAP quota in thunderbird's statusbar and will warn you when you reach a configurable limit...
Convert for SeaMonkey »
EditEmailSubject Compatible
#
This module allows you to change email subjects
Tested Versions: 2.0.3
Convert for SeaMonkey »
Exit Button Thunderbird Compatible
#
Adds a toolbar button to exit Thunderbird. Go to View menu, Toolbars, Customize... and drag the icon where you want...
Tested Versions: 0.5
Compatibility Notes: Note: this and Exit Button Firefox will not cooperate together so choose only one.
Convert for SeaMonkey »
ExQuilla for Microsoft Exchange Mostly compatible
#
Thunderbird email accounts, including contacts, connecting to Microsoft Exchange Web Services.
Tested Versions: 38.0.1159
Compatibility Notes: This extension is reported to work in SM but there are a few errors in the console so you may expect some minor things to be broken.
Convert for SeaMonkey »
Folder Pane View Switcher Not compatible
#
Add arrow buttons for rotating among folder views, and switch to "All Folders" view when hovering over the folder pane during drag & drop.
GlassMyBird Compatible
#
GlassMyBird enables more AeroGlass effects than the default Thunderbird theme (only possible on Windows Vista and 7 when AeroGlass is enabled). See instructions inside add-on description how to enable Glass on Windows 8.
Tested Versions: 1.0.7
Compatibility Notes: On AMO tagged with "TB only", works fine after conversion due to dlangton on unknown Operating System with unknown SeaMonkey version
Convert for SeaMonkey »
ImportExportTools Compatible
#
Adds some tools to import and export folders and messages
Convert for SeaMonkey »
Keyword Highlight Not compatible
#
Keywordhighlight changes color/size/weight of your favorite keywords...
Lightning Calendar Tabs Compatible
#
Displays tabs which allows quick navigation between time periods in Lightning calendar. All views of calendar are supported. Color of tab texts can be adjusted.
Tested Versions: 1.4
Compatibility Notes: On AMO tagged with "TB only", works fine after conversion due to dlangton on unknown Operating System with unknown SeaMonkey version
Convert for SeaMonkey »
mailmindr Mostly compatible
#
Follow up for Thunderbird E-Mails. Lightning or other AddOns are not required. Set a reminder by adding a label or by context menu and let mailmindr remind you.
Compatibility Notes: Works fine but there may be errors in console.
Convert for SeaMonkey »
Manually sort folders Not compatible
#
This extension allows you to manually sort (order) your folders in the folder pane of Thunderbird or automatically sort them, but in a better way. This extension also allows you to re-order accounts in the folder pane.
PrintingTools Not compatible
#
Adds some options to print messages and addressbooks
ProfileSwitcher Compatible
#
It adds some options to launch easily other profiles and the Profile Manager.
Tested Versions: 1.6.2
Convert for SeaMonkey »
Quicktext Not compatible
#
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
QuoteAndComposeManager Compatible
#
This extension for Thunderbird gives you some options about compose window and the headers layout in reply and forwarded mails.
Tested Versions: 0.4.0.2
Convert for SeaMonkey »
Remove Duplicate Messages (Alternate) Not compatible
#
Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).
Compatibility Notes: Use version at http://removedupes.mozdev.org/installation.html without any conversion.
Ruler Bar Not compatible
#
This appends a ruler to the mail composition window.
Select Inbox Partially compatible
#
Automatically select the Inbox folder at startup, even if there is no account set to automatically check for new emails. Important: the author will provide no other update for this add-on.
Tested Versions: 2.5
Compatibility Notes: The main function of opening Inbox works fine, however options for selecting messages are either buggy or do not work so keep them disabled.
Convert for SeaMonkey »
Show Address Only Compatible
#
Adds columns to display Sender/Recipients mailaddress only.
Tested Versions: 0.1.9
Compatibility Notes: Converted Version tested with SeaMonkey 2.53.2 WIN
Convert for SeaMonkey »
Signature Switch Compatible
#
Switch the signature on/off or choose a new one from your predefined set...
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Smilie Inserter Compatible
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Insert smilies in messages...
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Stationery Not compatible
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Extension to mimic Outlook Express Stationery. Allow you to use HTML files as templates for mail. Also allow custom template in replies or forwarded mail!
SubSwitch Compatible
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Simplify email categorization - it will be easier for you and others to manage mail. Define the set of prefixes for all emails you send or let SubSwitch to autodiscover it. While writing insert prefix to the title - choose one from your set.
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Tag Toolbar Not compatible
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Add toolbar for toggling tags.
Thunderbird Message Filter Import/Export Enhanced Compatible
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Thunderbird Message Filter Import/Export Enhanced is a compatibility port of Wind Li's add on. Original add on here: https://addons.mozilla.org/en-US/thunderbird/addon/thunderbird-message-filter-imp/
Tested Versions: 1.0.3
Compatibility Notes: On AMO tagged as not available for SeaMonkey, Thunderbird Message Filter Import/Export Enhanced [converted] 1.0.3  installs without problems and works fine with unofficial (akalla) English SeaMonkey 2.46  (Windows NT 6.1; WOW64; rv:49.0)  Gecko/20100101 Firefox/49.0 Build 20160923004119  (Default Classic Theme)  on German WIN7 64bit
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Today's messages Not compatible
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Show only your messages received during the current day, the last 7 days or the last 30 days thanks to 3 buttons.You may use pin button to keep filters applied when switching to your other inbox/folders.
withAttach Partially compatible
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This extension adds a menu option (and a toolbar button) to compose an email "with attachments"...
Compatibility Notes: Toolbar buttons don't show.
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XNote Not compatible
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Persistent sticky notes for Thunderbird associated to mails...