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Email Addresses in Message Headers
Requires Restart
Shows email addresses in message headers, including those of contacts, and provides control over message header presentation.
Mukparasi
Requires Restart
A Korean popup dictionary based on Rikaichan
Requires the additional dictionary addon.
DOM Inspector
Requires Restart
Inspect the DOM of HTML, XUL, and XML pages, including the mail...
Filter SubFolders
Requires Restart
Applies mail filters to sub folders of an IMAP account, not just the Inbox
replyTo
Requires Restart
Adds a menuitem to the Mail context Menu to Reply to a different Mailadress
Buttons!
Requires Restart
Adds buttons to the Thunderbird toolbars such as Next! and Previous! buttons for navigating through all messages instead of just unread ones. See homepage for more...
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.
Trueblock Plus
Requires Restart
Trueblock Plus is a fork of the Adblock Plus extension for blocking unwanted advertisements on the web. This fork provides the exact same features as Adblock plus, with the unpopular, unwanted "acceptable ads" (non-)feature turned off by default.
Pydio for Filelink
Requires Restart
Adds support to use Mozilla Filelink with an Pydio account.
Chat RTL
Requires Restart
Fixing the Chat so it would support RTL languages (i.e. Hebrew, Arabic) better.
CallingID Link Advisor
Requires Restart
CallingID Link Advisor verifies the links you see in Firefox and Thunderbird are safe before you follow them. When the mouse is placed over any link a risk assessment and the full details of the site owner are displayed, helping you evaluate the...
Alphanumerator
Requires Restart
Convert alphanumeric phone numbers to just numbers. Simply highlight the text, right-click it, and click "Alphanumerate". For example, 1-800-PICK-UPS would be converted to...
Task Me (activity logger)
Requires Restart
Activity logger (sampled task monitoring) which uses calendar to store user's activities.
It periodically displays window with textbox where user can put description of currently performed tasks. The description is saved in a calendar.
Text size toolbar
Requires Restart
Adds text size buttons to the toolbar. This has now been superseded by the Zoom toolbar https://addons.mozilla.org/en-US/firefox/addon/6118
Report Spam
Requires Restart
Report spam is a Thunderbird plugging to report antispam errors. A new button is added to header tool bar in order to signal a message as a false positive (a ham that is tagged as spam) or a false negative (a spam not tagged as spam).
Address book synchronizer between Memotoo.com and Thunderbird
Requires Restart
Synchronize your address book between Mozilla Thunderbird and Memotoo.com !...
NestedQuote Remover
Zhong Wen
Requires Restart
Mouse over a Chinese character to find out it's meaning. A popup will appear showing the 'Pinyin' pronunciation, the simplified character form, and the English translation. You can customize what parts to show on the preferences window.
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