Up & Coming Extensions

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AddressBook in Tab Requires Restart

Adds a button that can be put in toolbars which opens the addressbook in a new tab like pastismans AddressBookTab

Rated 4 out of 5 stars (2)
1,551 users

Music World Anonymous Quick Button Requires Restart

A quick button link to MusicWorldAnonymous.com. Music World Anonymous is a site about helping bands find fans for free!

Rated 5 out of 5 stars (1)
1,290 users

Yet Another Remove It Permanently Requires Restart

Remove elements and block content on Web pages.

Rated 4 out of 5 stars (38)
1,805 users

MEGAbird Requires Restart

Add MEGA support to Thunderbird's Filelink feature.

Rated 5 out of 5 stars (5)
1,139 users

Add-ons Manager Context Menu Requires Restart

Add more items to Add-ons Manager context menu.

Rated 5 out of 5 stars (36)
169,198 users

BiDi Mail UI Requires Restart

Direction control and BiDi-related charset misdetection correction

Rated 4 out of 5 stars (27)
3,286 users

Ad-Blocker

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 (140)
45,977 users

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 4 out of 5 stars (12)
34,251 users

AutoProxy-ng Requires Restart

This is a fork of AutoProxy, which can run the latest version of Firefox.

Rated 5 out of 5 stars (31)
4,417 users

adaware ad block

By blocking annoying ads and nosy trackers, adaware ad block nearly doubles your browsing speed! And with the most robust antivirus-level cloud-scanning technology of any ad blocker on the market, you’ll be safe from the latest cyber-threats.

Rated 4 out of 5 stars (56)
76,577 users

Hebrew Calendar Requires Restart

Show the Hebrew date in your browser's status.

Rated 4 out of 5 stars (40)
1,245 users

WebDAV for Filelink Requires Restart

Adds the possibility to use a WebDAV store for Filelink. With this extension you can link attachments to a WebDAV service, for example as provided by Apache's mod_dav or some public services.

Rated 4 out of 5 stars (18)
1,668 users

No Resource URI Leak

Deny resource:// access to Web content: We fill the hole to defend against fingerprinting. Very important to Firefox privacy. A direct workaround for bugzil.la/863246

Rated 4 out of 5 stars (21)
6,155 users

Persona Switcher Requires Restart

Quickly switch between your personas or reset it back to the default via a menu or the keyboard. You can also automatically rotate through all of your themes on a time interval you select. Works for Firefox, Thunderbird, and Seamonkey.

Rated 5 out of 5 stars (49)
1,342 users

GProxy Tool Requires Restart

GProxy lets you set and clear GPass local proxy in Firefox and Thunderbird, and do more.

Rated 4 out of 5 stars (8)
3,160 users

ReplyWithHeader Requires Restart

Outlook style headers and few goodies for Thunderbird & Postbox.

Rated 4 out of 5 stars (8)
1,214 users

OutlookAlike BETA Requires Restart

Makes Thunderbird looking like Outlook.

Rated 4 out of 5 stars (34)
3,555 users

BlunderDelay Requires Restart

Thunderbird Extension: AutoSend Unsent Messages. Flushes entire outbox at regular intervals.

Rated 4 out of 5 stars (15)
1,239 users

Add-on Update Checker Requires Restart

Adds Tools menu item to check Add-ons for updates. Includes toolbar icon.

Rated 4 out of 5 stars (56)
20,253 users

Perfect View

Image viewer with smooth dynamic zoom, pan and rotate. View slide shows of images or files and capture page elements and tab content. Apply image filters. Save images in various formats.

Rated 4 out of 5 stars (9)
1,132 users