Newest Extensions


Quick Locale Switcher 2 Requires Restart

Allows you to quickly switch to a different language (User Interface, Spell Checker Dictionary and Website content) in your Mozilla application.

Rated 5 out of 5 stars (1)
63 users
Added October 17, 2016

Attach from Clipboard Requires Restart

Create file attachments directly from the system clipboard.

Not yet rated
27 users
Added October 17, 2016

Reply As Original Recipient Requires Restart

Reply with the From: field set to the To: field from the original email.

Rated 5 out of 5 stars (1)
11 users
Added October 17, 2016

Reply To All Reminder Requires Restart

Asks for confirmation when "Reply" instead of "Reply to All" is pressed on an email with multiple recipients.

Not yet rated
24 users
Added October 8, 2016

SMTP Switch Reborn Requires Restart

SMTP Chooser.

Not yet rated
14 users
Added October 8, 2016

The Adblocker Project

A powerful ad blocker that blocks ALL ads but ads from publishers who shares revenues with targets YOU choose.

Rated 5 out of 5 stars (3)
99 users
Added September 5, 2016


Ad Blocker lets you block all ads, tracking & malware from the web world. It is an effective solution to browse the web without offensive and annoying ads you hate to see.

Rated 4 out of 5 stars (8)
23,038 users
Added September 1, 2016

Adblock Cyceam

Earn extra money while browsing online! Get rid of ads, and optionally tip your favorite sites.

Not yet rated
72 users
Added August 29, 2016

Thunderbook Requires Restart

Export messages (including RSS items) as e-books.

Not yet rated
111 users
Added August 26, 2016

Checkbox Column Requires Restart

Adds a custom column to Thunderbird's messages list (thread tree), making it easier to select multiple messages on devices with a touchscreen display.

Rated 5 out of 5 stars (1)
114 users
Added August 26, 2016

Disable Add-on Compatibility Checks (Version 40+)

Reinstates the extensions.checkCompatibility preference.

Rated 5 out of 5 stars (2)
416 users
Added August 18, 2016

Image Zoom (ugly fixes) Requires Restart

A lazy fixing of Image Zoom

Rated 3 out of 5 stars (6)
596 users
Added August 9, 2016

AastraClickToCall Requires Restart

Converts telephone numbers into clickable links for use with Aastra IP Phones

Not yet rated
24 users
Added August 2, 2016

MultiTemplateLoader Requires Restart

Manages & applies multiple HTML templates when creating/replying messages.

Templates may be either local files or online links (http:// or ftp://). Up to 9 templates can be defined and easily switched, also using shortcut keys.

Not yet rated
93 users
Added July 22, 2016

Identity Checker Requires Restart

This add-on checks to sender identity when send a message.

Not yet rated
32 users
Added July 21, 2016

Layout Button Requires Restart

A toolbar button to switch between layouts.

Rated 5 out of 5 stars (1)
145 users
Added July 9, 2016

Large Fonts Requires Restart

This add-on enables you to change the font size of the plain text editor of Thunderbird.

Rated 1 out of 5 stars (1)
377 users
Added June 25, 2016

LookOut (fix version) Requires Restart

LookOut is a plugin which allows Thunderbird to interface with Microsoft's mail tools by decoding metadata and attachments encapsulated/embedded in a TNEF encoded attachment (aka winmail.dat).
Support: Thunderbird and SeaMonkey

Rated 5 out of 5 stars (4)
9,996 users
Added June 24, 2016

TexTra Thunderbird Requires Restart


Not yet rated
46 users
Added June 23, 2016 templates

This plugin adds our savvy email templates to your Thunderbird toolbar.

Not yet rated
15 users
Added June 17, 2016