Top-Rated Extensions

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Expertspam Requires Restart

Report spam, false-positives or phishing back to your antispam provider.

Rated 3 out of 5 stars (1)
226 users

Gif Remover

To fastest your browser to surfing internet without extension gif.

Rated 3 out of 5 stars (1)
28 users

pass-manager Requires Restart

Replace integrated password managers storage with zx2c4's pass (www.passwordstore.org)

Rated 3 out of 5 stars (1)
64 users

Signature Fixer Requires Restart

Fixes the Signature Stacking bug for Forwards/Replies.

Rated 2 out of 5 stars (4)
409 users

Lightning Multiweek View Requires Restart

Adds a multiweek view to...

Rated 2 out of 5 stars (4)
70 users

nntpthreads Requires Restart

Nntpthreads lets you add up to four new buttons in the toolbar to easily access the menu item from "View > Threads"...

Rated 2 out of 5 stars (4)
27 users

Website Blocker Requires Restart

Block websites you don't want the browser to get into.
Block by a whole domain name or a specific address.
Block until further notice or until a certain date.

Rated 2 out of 5 stars (13)
10,569 users

mozCleaner

Cleans your Firefox, Thunderbird, SeaMonkey, Fennec (unstable), Instantbird and BlueGriffon.

Rated 2 out of 5 stars (6)
2,164 users

Year View Requires Restart

This is an example extension that adds a simple year view to Sunbird/Lightning.

Note that freebusy information is only provided if all calendars are cached. See long description for more info. Also, Calendar 1.0pre with bug 489590 fixed is required.

Rated 2 out of 5 stars (5)
14 users

Wunderlist Task Button Requires Restart

Non-official addon for Wunderlist. Easily transform a mail into a task for Wunderlist with a single click.

Rated 2 out of 5 stars (8)
336 users

Tabbed Mail Preferences Requires Restart

Enhances control over some aspects of tabbed mail browsing.

Rated 2 out of 5 stars (2)
5 users

PassToScript extension Requires Restart

Extension to pass e-mail in eml (raw) format directly to the script specified

Rated 2 out of 5 stars (2)
27 users

Boomerang Requires Restart

Boomerang E-Mail is an Add-on for the Thunderbird E-Mail-Client and is based on the Boomerang e-Mail algorithm (patent pending).

It provides functionality to send a certain e-mail (including attachments) to several recipients one after the other and...

Rated 2 out of 5 stars (6)
4 users

Nightly Tester Tools Lite Requires Restart

This is a cut down version of Nightly Tester Tools by Mossop, which is 77.6 KB. I've only included the "copy build id" and "build id in titlebar"...

Rated 2 out of 5 stars (8)
58 users

Purge Events Requires Restart

Purge events from Sunbird and Lightning calendars

Rated 2 out of 5 stars (6)
176 users

Test Pilot for Thunderbird

Add-on has now been discontinued, see below.

Rated 1 out of 5 stars (15)
9,978 users

Re: Sort Requires Restart

「Re2:」「Re4:」というふうに「Re:」をまとめます。

Rated 2 out of 5 stars (1)
40 users

Cairo-Dock unread messages Requires Restart

Displays the number of unread messages in all inboxes on your dock.

Rated 2 out of 5 stars (1)
158 users

Spoof Detector Requires Restart

Extension for Email Spoofing Detection

Rated 2 out of 5 stars (1)
65 users

forcebutton Requires Restart

This add-on can resend mails, so you "force" the other side to answer. It could be useful at corporate environment.

Rated 2 out of 5 stars (1)
28 users