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MinimizeToTray revived Requires Restart

Minimizes windows into the system tray.

Rated 4 out of 5 stars (395)
1,340 weekly downloads

Telify Requires Restart

Converts telephone numbers into clickable links for use with CTI applications, SIP clients, Skype, Netmeeting, snom phones, the AGFEO TK-Suite Client and SerVonic IXI-PCS.

Rated 3 out of 5 stars (57)
488 weekly downloads

WorldIP - Geo Add-on with Security Features Requires Restart

Professional Geo Add-on with security features and advanced network tools. Anti-phishing. Protection against DNS spoofing and fake sites. All DNS records for domain. The real location of web server, country flag, extended information about datacenter

Rated 5 out of 5 stars (124)
124 weekly downloads

Disable Addon Compatibility Checks (Version 4-56)

Reinstates the extensions.checkCompatibility preference.

Rated 5 out of 5 stars (5)
122 weekly downloads

Nagios Checker Requires Restart

The statusbar indicator of the events from the network monitoring system Nagios.

Rated 5 out of 5 stars (69)
81 weekly downloads

Certificate Patrol Requires Restart

Your browser trusts many certification authorities and intermediate sub-authorities quietly, every time you enter an HTTPS web site. This add-on reveals when certificates are updated, so you can ensure it was a legitimate change.

Rated 4 out of 5 stars (68)
70 weekly downloads

Gmail Manager Requires Restart

The original Gmail notifier for multiple accounts. Allows you to receive new mail notifications along with viewing account details including unread messages, saved drafts, spam messages, labels with new mail, space used, and new mail snippets.

Rated 4 out of 5 stars (1,151)
58 weekly downloads

Addons Recent Updates Requires Restart

Show more addons recent updates

Rated 5 out of 5 stars (11)
42 weekly downloads

Version Number in Add-ons Manager

[Restartless] [e10s Compatible]
Easily viewable version info in the Add-ons Manager on Firefox/Thunderbird 41.0 - 56.*
Also restores the add-on version number on Firefox/Thunderbird 41.0 - 56.*.

Rated 4 out of 5 stars (4)
32 weekly downloads

mozCleaner

Cleans your Firefox, Thunderbird, SeaMonkey, Fennec (unstable), Instantbird and BlueGriffon.

Rated 3 out of 5 stars (6)
32 weekly downloads

RemindMeBot-Reddit

All the great features of /u/RemindMeBot in a quick and easy to use extension!

Rated 2 out of 5 stars (4)
30 weekly downloads

New Plugin Disabler

Deactivates new plugins.

Rated 5 out of 5 stars (4)
29 weekly downloads

CipherFox Requires Restart

Displays the current SSL/TLS cipher, protocol and certificate chain in the Add-on bar and Site ID dialog

Rated 5 out of 5 stars (34)
29 weekly downloads

Yahoo! Mail Notifier Requires Restart

This extension notifies you when new messages arrive in your Yahoo mailbox.

Rated 3 out of 5 stars (158)
28 weekly downloads

Classic Pop-up Alerts

This addon returns the old view of the pop-up notifications, as in Firefox 4.0 - 43.0

Rated 3 out of 5 stars (2)
27 weekly downloads

SanRockstar Requires Restart

Music

Rated 5 out of 5 stars (3)
26 weekly downloads

Caret Out Requires Restart

Disables change of the caret browse mode by shortcut key(F7).

Rated 5 out of 5 stars (4)
26 weekly downloads

Check for Updates in Help Menu Requires Restart

Adds a 'Check for Updates' entry to the Help menu.

Rated 5 out of 5 stars (17)
26 weekly downloads

yangben dictionnary Requires Restart

spell check for Yangben Cameroun

Not yet rated
26 weekly downloads

IMEStatus Requires Restart

Show IME status by input/textarea/textbox background color.

Rated 4 out of 5 stars (4)
25 weekly downloads