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Phoenity Buttons
InspectorWidget
Requires Restart
Adds toolbar button and context menus for invoking the DOM Inspector (DOMi) for either chrome or content elements.
addressContext
Requires Restart
An extension to add addressbook-related options to the context...
Layout Button
A toolbar button to switch between layouts.
Version 4 (Requires TB v128+): The button cycles through layouts, Context menu (right-click the button) allows for selecting specific layout
Version 1 to 3: The button used a popup to select layouts
Protected E-mail Addresses
Requires Restart
Generates protected and disposable e-mail addresses and filters junk mail sent to invalid addresses.
Old-style smilies
Requires Restart
Reverts the smilies in Thunderbird to those of version 2.
Track Package
mailmindr
Follow up for Thunderbird E-Mails.
Web: https://mailmindr.net/
Twitter: @mailmindr
Sensitivity Header
Requires Restart
Implement the "Sensitivity" header for outgoing messages (described in RFC 4021 section 2.1.55).
This allows the user to select Private / Personal / Company-Confidential (or none) for an outgoing message.
No longer maintained: See below.
Thunderbird-DontRestoreTabs
Requires Restart
Allows the user not to restore tabs at startup in Thundertbird
Flat Folder Tree
Requires Restart
Selectively breakout or promote sub-folders under an intermediate folder in the folder tree. Use with IMAP servers where some folders remain collapsed under special namespace like [Gmail] or the INBOX itself.
No More Install Delay
UPDATE: XPI delay has been removed in Firefox 40!
Disable the install delay in Firefox. New 2.0 version now includes GreaseMonkey scripts!
Unlike similar addons, this works on Firefox 4 and beyond.
Rescue Conflicting Alternatives
Renders conflicting alternative bodies if the message has them.
Free Memory Button
Slovak spell checking dictionary
Slovak spell checking dictionary for Mozilla applications (based on the "open-source" dictionaries by Zdenko Podobný).
Quicker Filer
Requires Restart
Quicker Filer helps you file your messages into folders using keyboard shortcuts and quick search method. Navigate through folders by typing the start of a folder name and the Quicker Filer dialog will show you all folders that matches as you type.
To create your own collections, you must have a Mozilla Add-ons account.
