Most Popular Extensions

Subscribe

CapsKiller Requires Restart

Caps Killer is a protection against newbies using caps in their mails.

Rated 5 out of 5 stars (2)
64 users

Perapera Japanese-German Dictionary File Requires Restart

This is additional dictionary file for use with the Perapera Japanese Pop-up Dictionary add-on.

Not yet rated
64 users

DHS Facebook Unblock Requires Restart

Plugin to get around the Washtenaw County Facebook block.

Rated 3 out of 5 stars (1)
64 users

Lovebird Requires Restart

Email organized around the people you care about.

Rated 3 out of 5 stars (3)
63 users

Lightning Multiweek View Requires Restart

Adds a multiweek view to...

Rated 2 out of 5 stars (4)
63 users

manoderecha Requires Restart

Assists to setup a chat account for manoderecha

Not yet rated
62 users

Spoof Detector Requires Restart

Extension for Email Spoofing Detection

Rated 2 out of 5 stars (1)
62 users

NetscapeCommunicator 4.x Account Settings Migrator Requires Restart

Provies ability to migrates account settings and preferences from NC4.x profiles.

Not yet rated
61 users

After Unsent Mail Is Sent Requires Restart

Run a program of your choice after unsent mail has been sent.

Rated 5 out of 5 stars (1)
60 users

Copy Reminder List To Clipboard

Provides button to copy the list of current reminders to the clipboard.

Not yet rated
59 users

Lowercase Email Addresses in Message Headers Requires Restart

Shows lowercase email addresses in message headers and their tooltips.

Rated 1 out of 5 stars (1)
58 users

Seturgent Requires Restart

Sets the urgent flag (X11) of the Thunderbird window under Linux in case of new messages. Does ignore special folders like Drafts, Junk and such.

Rated 5 out of 5 stars (2)
58 users

Mark Read On Reply Requires Restart

A simple extension to mark messages read after you click a reply menu or button (or Ctrl+R)

Rated 3 out of 5 stars (3)
58 users

Shift Box Requires Restart

Replay your INBOX!

Not yet rated
58 users

Markov Dictionary Switcher Requires Restart

Based on Dictionary Switcher but more than a thousand times faster and you can choose dictionaries that you want to use. Detects the language of the message that you are composing and changes the spelling dictionary.

Rated 4 out of 5 stars (7)
58 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

World Weather Requires Restart

Display local weather information from around the...

Rated 1 out of 5 stars (2)
58 users

PasteIP Requires Restart

Easy pasting of your IP address or User-Agent in a textbox. Comes in handy when posting on forums, etc.

Rated 4 out of 5 stars (2)
58 users

Workspace for Thunderbird Requires Restart

A simple editor for executing snippets of JS. In Thunderbird.

Not yet rated
57 users

Perapera Japanese-French Dictionary File Requires Restart

This is additional dictionary file for use with the Perapera Japanese Pop-up Dictionary add-on.

Rated 1 out of 5 stars (1)
57 users