Top-Rated Extensions

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Nokia Synchronization

Synchronize Thunderbird and Nokia phone...

Rated 2 out of 5 stars (43)
528 users

pass-manager

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

Rated 3 out of 5 stars (1)
15 users

Signature Fixer

Fixes the Signature Stacking bug for Forwards/Replies.

Rated 2 out of 5 stars (4)
453 users

Lightning Multiweek View

Adds a multiweek view to...

Rated 2 out of 5 stars (4)
100 users

nntpthreads

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)
32 users

Wunderlist Task Button

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

Rated 2 out of 5 stars (7)
255 users

Year View

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)
12 users

mozCleaner No Restart

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

Rated 2 out of 5 stars (5)
2,399 users

English - English Dictionary

This is an English dictionary for looking up words in English.

Select a word using your mouse and find its meaning in English!

Rated 2 out of 5 stars (5)
8,512 users

Tabbed Mail Preferences

Enhances control over some aspects of tabbed mail browsing.

Rated 2 out of 5 stars (2)
3 users

PassToScript extension

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

Rated 2 out of 5 stars (2)
21 users

CALDAV - Search/Subscribe

Add CalDAV search & subscribe feature to Lightning

Rated 2 out of 5 stars (7)
2,236 users

Nightly Tester Tools Lite

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)
98 users

Purge Events

Purge events from Sunbird and Lightning calendars

Rated 2 out of 5 stars (6)
187 users

Test Pilot for Thunderbird No Restart

Add-on has now been discontinued, see below.

Rated 1 out of 5 stars (15)
9,006 users

Disable Addons

Disable Addons.

Rated 2 out of 5 stars (1)
4 users

Re: Sort

「Re2:」「Re4:」というふうに「Re:」をまとめます。

Rated 2 out of 5 stars (1)
32 users

Cairo-Dock unread messages

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

Rated 2 out of 5 stars (1)
238 users

Spoof Detector

Extension for Email Spoofing Detection

Rated 2 out of 5 stars (1)
75 users

forcebutton

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)
60 users