Add-ons
Most Popular See all »
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Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.197,874 users -
The User Agent Switcher extension adds a menu and a toolbar button to switch the user agent of a browser.128,089 users -
Manages the Remote XUL whitelist to allow websites and local files to load XUL content. For versions compatible with Firefox 41 and lower, see All Versions page below.90,265 users -
View HTTP headers of a page and while browsing.53,824 users -
Control what gets sent as the HTTP Referer on a per-site basis.51,509 users
Top Rated See all »
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![Icon for Classic Toolbar Buttons [Tb24-58]](https://addons.thunderbird.net/user-media/addon_icons/353/353047-32.png?modified=mcrushed)
'Classic Toolbar Buttons' add-on restores old toolbar button ui (known from Fx 4-7s small view, Fx 4-12s large view & Tb 5-14) for current Firefox, Thunderbird and Seamonkey versions.
Beta builds on versions page!19,452 users -
![Icon for Add-ons Manager - Version Number [Tb 45-56]](https://addons.thunderbird.net/user-media/addon_icons/626/626834-32.png?modified=1531946262)
Restores version numbers for all installed add-ons inside Add-on Manager on Firefox, Thunderbird and Seamonkey.1,429 users -
Fight the text ads! Element Hiding Helper is a companion extension for Adblock Plus meant to make creating element hiding rules easier.197,874 users
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Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website.2,232 users -
The all in one toolbar(item). Houses and manages bigger amounts of buttons (Clear Cache, Clear Cookies, ...), Menus (User Agent spoof...) and checkboxes (Javascript, Flash, ...). Extensible from online-database or with self created buttons.8,642 users -
Provides extended link properties: size of linked file, last modified time, etc.970 users
Recently Added See all »
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Change prefs so that you use addons.thunderbird.net as the provider for add-on downloads and updates.0 users -
Adds a toolbar button to Composer to open the current file in another editor or browser.17 users
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Shows Desktop size image when you hover over a thumbnail .Works with many sites including Amazon, Facebook, Flickr, YouTube.2 users -
Add toolbar button for about-addons-memory-pm
But not only, also provide shortcuts for :
- Free Memory (needs free memory button)
- Abouts list page (about:about)
- Plugins page (about:plugins)
github.com/intika/about-addons-memory-pm152 users -
Adds an 'add custom tab' option to the Tabs drop-down menu of SeaMonkey's sidebar.30 users
See all 108 extensions in Web and Developer Tools »
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