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Extra Format Buttons Requires Restart

Adds a font size (in pixels), strikethough, subscript and superscript buttons to Thunderbird's Compose Window.

Rated 4 out of 5 stars (19)
117 users

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Auto Zip Attachments Requires Restart

Auto Zip Attachments allows you to easily compress (zip) attachments.

Rated 4 out of 5 stars (68)
1 user

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Sun Cult Requires Restart

Worldwide Sunrise, Sunset, Twilight, Moonrise and Moonset...

Rated 5 out of 5 stars (109)
14 users

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dictCheck Requires Restart

dictCheck - Double click on any english word in a page to get the polish meaning. Uses fast online dictionary.
Simple and easy! Enjoy!

Rated 5 out of 5 stars (4)
0 users

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Copy As Plain Text Requires Restart

Removes formatting from copied text.

Rated 4 out of 5 stars (60)
37 users

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FavLoc Requires Restart

FavLoc allows you to set folders as "favorite locations" to which you can easily download. FavLoc menus will appear on the File menu (for saving pages), the context menu (for saving images and links), and on the download...

Rated 4 out of 5 stars (59)
0 users

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Thunderbird Biff Requires Restart

This add-on provides a visual indicator of new Thunderbird mail availability in supported clients (Firefox, Sunbird) and Thunderbird itself. Note: you MUST install this add-on in BOTH Thunderbird and supported clients as there are both client AND ser...

Rated 4 out of 5 stars (37)
5 users

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Zindus Requires Restart

Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)

Rated 4 out of 5 stars (199)
19 users

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TryAgain Requires Restart

TryAgain keeps trying to load a webpage when the server cannot be reached.

Rated 4 out of 5 stars (68)
1 user

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Thunderbird Taiga Integration Requires Restart

Convert mails to user stories, tasks and tickets for the Taiga project management system. See https://pehei.de/post/thunderbird-taiga-integration for instructions.

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0 users

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bosskey Requires Restart

Add Boss Key, Minimize/Close to tray and memory auto cleaning to Firefox.

Rated 4 out of 5 stars (142)
0 users

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Any Confirmation Message before Send Requires Restart

You can set Any Confirmation Message before Send.

Rated 5 out of 5 stars (4)
11 users

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Forward Requires Restart

Add Inline / As Attachment option to Forward button and Message context menu.

Rated 4 out of 5 stars (25)
111 users

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docked JS-Console Requires Restart

docks the JS-Console to the Bottom of the Browser

feel free to have a look at the source (see below) and suggest enhancements (borstel33 web de , Subject: docked JS-Console)

Rated 4 out of 5 stars (10)
0 users

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MR Tech About:About Requires Restart

Adds the following "about:" options to the Help menu

Rated 3 out of 5 stars (8)
0 users

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CantoFish Requires Restart

CantoFish is a popup Cantonese-English dictionary for Firefox. It contains over 200,000 entries and works with both traditional and simplified Chinese characters. The Yale and Jyutping romanization systems are supported, as well as Mandarin pinyin.

Rated 5 out of 5 stars (29)
0 users

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Copy Plain Text Requires Restart

Copies text without formatting...

Rated 4 out of 5 stars (185)
2 users

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TitleCase For Thunderbird Requires Restart

Transform strings into Title Case, Proper Case, Start Case, Camel Case, Upper Case, and Lower Case. Highlight your text and only changing what you highlighted.

Rated 4 out of 5 stars (14)
205 users

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Dictionary Switcher Requires Restart

Toggles dictionaries automatically or manually and displays the currently selected one

Rated 4 out of 5 stars (180)
24 users

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ThunderPlunger Requires Restart

Sorry but this addon is no longer supported in TB 60. See below.

This add-on provides a few new ways to keep Thunderbird clean.

Rated 4 out of 5 stars (31)
28 users

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