Newest Extensions
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Tategaki Requires Restart
Tategaki allows vertical writing-mode on mail compose window.
Live HTTP Headers (clone)
View HTTP headers of a page and while browsing.
This is an unofficial "Live HTTP headers" clone, mainly to fix the Replay feature!
fairBlock
Un bloqueur de publicité équitable. Préservez le web gratuit en choisissant sur quels sites vous bloquez la publicité.
Modify HTTP Response
Rewrite http response body using search & replace patterns
AMO Browsing for SeaMonkey
This extension makes browsing for extensions easier at addons.mozilla.org. It fixes incorrect information about some extensions being not available for SeaMonkey and adds links to the Add-on Converter where needed.
Restart Application Button
Restart Application Button lets you restart your Firefox and SeaMonkey application by a quick toolbar button click.
Proxy Privacy Ruler
Restrict Proxy by Private Windows, Tabs and Domain List
GNotifier
Add-on for Thunderbird that replaces the built-in notifications with OS native ones. It supports most Linux Desktop Environments as well as Windows 8.1/10.
GNOMErunner Options Requires Restart
Allows to customize GNOMErunner theme
Sensitivity Header + SPX Requires Restart
Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
Forked from another add-on developed by ff_bob, added SPX header for Sophos security appliances
RequestPolicy Continued
Be in control of which cross-site requests are allowed. Improve the privacy of your browsing by not letting other sites know your browsing habits. Secure yourself from Cross-Site Request Forgery (CSRF) and other attacks.
BrightSide XUL Installer
Automatically installs a set of domains to the Remote XUL whitelist.
No need flash plugin on embeded youtube movies
No need flash plugin on embeded youtube movies
Rikaichan Japanese-Hungarian Dictionary File Requires Restart
This is a dictionary file add-on for the Rikaichan extension.
ZeroWasteFrance base docu
Quickly add a document to the ZeroWaste documentation base.
To create your own collections, you must have a Mozilla Add-ons account.