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nntpthreads
Requires Restart
Nntpthreads lets you add up to four new buttons in the toolbar to easily access the menu item from "View > Threads"...
Add Birthdays To Calendar
Requires Restart
Birthdays from addressbook-contacts will be added as events to Lightning...
Autohide Folders panel
Requires Restart
Extension automatically hides the folders panel. The folder panel can be seen by placing the mouse pointer in the left corner of the window or by Accel-1 shortkey.
LDAP - View Groups Members
Requires Restart
Allow the user to view the members of the LDAP directories in the addressbook
Single Domain
Warns if you send mail from or to a specified domain. If there are multiple accounts in your profile, you can isolate one so that you can't send mail to that domain from outside or vis versa without warning.
BccBlocker
Requires Restart
A ThunderBird extension to prevent the use of the Bcc field.
Bcc is the worst thing ever.
It kills transparency inside an organization.
If you use the Bcc feature, you should ask yourself why..
Identity Checker
Requires Restart
This add-on checks to sender identity when send a message.
Kyrgyz Key
Requires Restart
Allows to type Kyrgyz alphabets like Ө,Ң and Ү in any text fields of Firefox Browser, Web Pages and Thunderbird. Converts Latin words into Cyrillic words instantly. Makes EnglishRussian translations.
BorderColors
Requires Restart
Color-codes compose windows depending the active e-mail identity, to avoid sending messages from the wrong account.
SmtpSwitch
Requires Restart
SmtpSwitch allows to choose the smtp server when clicking on the 'Send' button.
File Bug Report
Requires Restart
For testers and developers who submit bug reports: Adds "File Bug Report" command to Tools menu. Opens browser at the Bugzilla enter-bug page in guided format with product and build identifier.
View Headers Toggle Button
Requires Restart
This extension adds a toolbar button that allows the easy toggling of viewing all message headers.
random(signature)
XPCOMViewer
SendWithoutSubject
Only Minor Update
Lovebird
Contact DnD
Requires Restart
Enables one to assign a photo to a contact by dragging and dropping it from the local filesystem.
Reply To All Reminder
Requires Restart
Asks for confirmation when "Reply" instead of "Reply to All" is pressed on an email with multiple recipients.
RSS Linkify Subject
Requires Restart
Linkify Subject header with Content-Base URL when viewing RSS item to easily open it in...
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