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CapsKiller
Requires Restart
Caps Killer is a protection against newbies using caps in their mails.
Rikaichan Japanese-Dutch Dictionary File
Requires Restart
This is a dictionary file add-on for the Rikaichan extension.
All mail from all accounts
Requires Restart
Add a toolbar button to send and receive all mail from all accounts for Leopard theme.
FireCsv
Inbox Cleaner of expired Emails
Crash Me Now! (Simple)
Today's messages
Requires Restart
Show only your messages received during the current day, the last 7 days or the last 30 days thanks to 3 buttons.You may use pin button to keep filters applied when switching to your other inbox/folders.
QuickFilterPlus
Follow Up
Disable about:config
Requires Restart
Disable about:config feature of Firefox and Thunderbird.
Path Linker
Fit Images
Requires Restart
Fit large images to window when viewing a message.
Control how you want to fit images: by width, height or both.
DSN Settings 2
Requires Restart
Adds user interface settings for Delivery Status Notification (DSN) requests. This addon is useful for settings for Delivery Notification request and better experience with Notification Viewer addon.
SanRockstar
Lightning Nightly Updater (Unofficial)
Requires Restart
Quickly get to the latest nightly build of Lightning relevant to the version of Thunderbird and the OS you're on.
Icelandic Dictionary
Check for Updates in Help Menu
Requires Restart
Adds a 'Check for Updates' entry to the Help menu.
To create your own collections, you must have a Mozilla Add-ons account.
