Most Popular Extensions
Lightning Multiweek View Requires Restart
Adds a multiweek view to...
Lowercase Email Addresses in Message Headers Requires Restart
Shows lowercase email addresses in message headers and their tooltips.
Random Theme Switcher Requires Restart
This extension switches your themes at random.
DictsInfo Requires Restart
Search the highlighted text at Dicts.info.
Prevent accidental interaction with tab contents
DHS Facebook Unblock Requires Restart
Plugin to get around the Washtenaw County Facebook block.
Tv program Requires Restart
It shows popular stations TV program in listings, alerts and bubble infos. It's only for Czech and Slovak TV stations.
Localization: sk, cs, hu, en
Gravatars Requires Restart
Show a column with the Gravatar-picture and sender-name in email folders.
ePhotoUploader Requires Restart
ePhoto Uploader is a Mozilla/Firefox addon to allow you to upload any image on websites you're browsing to your ePhotoBay account by just one click. For the addon to work a free ePhotoBay account is required.
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"...
Set Default Columns Requires Restart
Provides ability to set default visibility of columns in the thread pane.
zFiler mail Requires Restart
Automatic conversion from 'plain' attachments to zFiler links, when message is being sent.
PasteIP Requires Restart
Easy pasting of your IP address or User-Agent in a textbox. Comes in handy when posting on forums, etc.
Soapy Requires Restart
Bypasses DNS-based censorship
NOTE: This was created as a SOPA protest in 2012. This does not work anymore for most sites. Use Tor instead.
privateID Requires Restart
This extension displays a warning if you send a message from your private emailID to an address/ mailing list which is not found in your Personal Address Book...
Message Notes Requires Restart
Add Notes to messages. Notes are stored in a plaintext file, typically in your profile. The plaintext notes file can be stored elsewhere to enable sharing of notes across a...
Spoof Detector Requires Restart
Extension for Email Spoofing Detection
Perapera Japanese-French Dictionary File Requires Restart
This is additional dictionary file for use with the Perapera Japanese Pop-up Dictionary add-on.
Attachment Manager Requires Restart
An extension to manage attachments across multiple emails.