Message and News Reading
Mark all read for Subfolders
It's the same like MarkSubfolders but it's compatible with Firefox 4 and later.
Keywordhighlight changes color/size/weight of your favorite keywords...
Join partial messages. Somewhat similar to MS Outlook Express "combine and decode".
Direction control and BiDi-related charset misdetection correction
Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.
Zoom in, zoom out, and reset zoom with one toolbar button. Works in the Compose window too.
Collapse and expand quotes. Please see the extension homepage for...
Link to tracking sites. (mainly Japanese companies)
A system tray extension for Linux and Windows, allowing to set up custom icon, hiding to tray instead of closing, display the number of unread messages in mailing applications, and other features ...
Remove the ">" prefix from quote when you make a reply.
Remove "[" and "]" from the subject when you make a forward.
Menu On Top (SuperMenu Avatar) No Restart
Move the Thunderbird menu bar to the top. Choose from a selection of visual styles + colors. Add frequently used bookmarks and an avatar icon without wasting precious screen space. Bookmark your favorite sites, emails, folders or configuration pages.
Allows URI texts written in webpages to be loaded by double clicks.
ConfigDate allows to configure the "Date" column in message threadpane. When displaying the message header, it is possible to display the (default) formated date or the senders local sent time (Date-String).
Desktop RSS editor for casual editing of RSS 2.0...
Linkify Subject header with Content-Base URL when viewing RSS item to easily open it in...
Fix bug 296542 by adding a Paste context menu to the Feed Properties (add subscription) dialog.
Introduces an option to specifically set which folder manually marked junk will go to per account.
Somewhere between Thunderbird 1.5 and Thunderbird 2 the message search bar disappeared. This extension restores the search bar. Thunderbird 2 and newer only.