Blocks annoying video ads on YouTube, Facebook ads, banners and much more.
Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
Search and remove messages which are the same as other messages in your mail folders (referred to as duplicates or dupes).
The "Swiss army knife" of folders. Turn your favorites into tabs - open folders and subfolders, move mails without scrolling around or searching. powerful + easy.
See new mail at a glance after automatic filtering - supports quickFilters addon!
Google and Zimbra contact sync for Thunderbird. (TB 24 and above NOT supported)
Displays icon for user agent of received mails.
Collections are groups of related add-ons that anyone can create and share.Explore Collections