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Custom User-Agent String
Set custom a User-Agent string for your Mozilla Firefox web browser with this restartless add-on...
User Agent Switcher
Adds a menu and a toolbar button to switch the user agent of the browser...
Display Mail User Agent
Displays icon for user agent of received mails...
User-Agent JS Fixer
This restartless add-on for Firefox extends the functionality of User-Agent add-ons...
JavaScript User-Agent fixer modify User-Agent User-Agent JavaScript
User Agent Switcher for Firefox
Adds a menu and a toolbar button to switch the user agent of the browser...
User Agent Changer for Firefox
Adds a menu and a toolbar button to change the user agent of a browser...
Cornfed SIP User Agent
Cornfed SIP User Agent is a SIP Softphone....
User Agent Quick Switch
Easily and quickly switch the Firefox User Agent with this restartless add-on...
Display Mail User Agent for Thunderbird
Displays icon for user agent of received mails...
Custom Geometry
Custom Geometry is an extension which resizes and positions the window according to your settings....
resize thunderbird extension custom Custom Geometry Resizes window
Custom Buttons 2
Create, maintain, import, and export custom toolbar buttons....
thunderbird extension thunderbird buttons Toolbar toolbar buttons
Custom Buttons
Custom Buttons is a Thunderbird extension that gives a possibility to create custom toolbarbuttons....
buttons custom Custom Buttons custom toolbarbuttons custom toolbar
Stylish-Custom
Custom additions to Stylish extension...
thunderbird extension thunderbird Stylish additions custom Stylish Stylish
Custom New Tab
With this restartless add-on for Mozilla Firefox you can load any URL you want when opening a new tab...
Custom Menus
Customize Firefox menus like never before...
Custom Download Manager
Allows you to personalize your download manager...