Add-ons
Extensions by Name
Sort by:
Theme Font & Size Changer for ThunderBird
Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.
TheRealURL
Requires Restart
Get URL information: expand short URLs, get title and content type information without visiting the site.
UPDATE, AUG 2013: THIS EXTENSION IS NO LONGER SUPPORTED. The source is open - if you wish to take on the development, you're welcome.
Thumbnail Zoom Plus
Requires Restart
Shows full image when you hover over a thumbnail. Works with Amazon, Baidu Images, Bing Images, Facebook, Flickr, Google+, Google Images, IMDb, LinkedIn, Netflix, Pinterest, Reddit, Twitter, Yandex, YouTube, Wikipedia, Yahoo Images, & many more.
Thunderbird Pedophile Reporter
Requires Restart
This add-on was created to allow anyone that is contacted by a suspected pedophile or suspected predator. This will gather the header information and send it to our servers to be reviewed by an investigator.
ThunderBirthDay
Requires Restart
Display birthdays from the Thunderbird addressbooks as events in Lightning.
TimerFox
Requires Restart
Easily counts down from a predefined number and alarms you when the count has reached zero.
Tiny JavaScript Debugger
TinyJSD is a JavaScript debugger for privileged code running Mozilla products like Firefox, Thunderbird, SeaMonkey. It serves to debug the application as well as extensions written in JavaScript.
TipTopic
Requires Restart
While you're surfing your favorite pages/topics on the web TipTopic informs you on who else is browsing the same pages/topics and is interested in/ available for discussion. Enjoy live dialog with your favorite topic followers while surfing the web!
Toggle Development Profile Prefs
Toggles Development Profile Preferences On When Enabled And Off When Disabled.
ToggleDocumentColors_
Requires Restart
Adds a toolbar button and keyboard shortcut to switch between the default page colors and user-defined colors.
Firefox shortcut: Control-Shift-C
SeaMonkey shortcut: Control-K
Togglify Add-on Toggler
Adds toolbar buttons for each restartless add-on (including user scripts and plugins) to toggle its enabled state.
Toolbar Buttons
Adds toolbar buttons to the customize toolbar window in several programs including Firefox, Thunderbird and SeaMonkey. Some of the buttons make commonly preformed actions quicker, others add new functionality.
Tooltip Plus
Requires Restart
Show tooltips for links and images with URLs, icons, alt text, and long titles.
Torrent Tornado
Requires Restart
A Torrent Client for Firefox and SeaMonkey, runs everywhere, created in pure JavaScript without binary software!
TotalSpoof
Track Package
Transliterator
As-you-type phonetic conversion of text from one alphabet to another, as well as transliteration/detransliteration of selected text anywhere within documents. Supports multiple languages and custom transliteration schemes.
To create your own collections, you must have a Mozilla Add-ons account.
