Miscellaneous
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Mail Sent Notifier
Allows to notify a HTTP-GET based webservice after successfully sent an email, e.g. for time registration systems.
Keyword to Latest Digg URL Converter
This addon converts a user selected keyword within a website, to the newest digg entry which encapsulates the target keyword.
Filter Uploader for Adblock Plus (unofficial) Requires Restart
DOES NOT BLOCK ADS! Don't install this add-on if you don't know what 'uploading' means!
This add-on Uploads the filters from your Adblock Plus installation to a FTP, HTTP, HTTPS server...
Addons Manager Hilite
Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Version 3.0 also includes sorting buttons. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.
withAttach Requires Restart
This extension adds a menu option (and a toolbar button) to compose an email "with attachments"...
AutoProxy-ng Requires Restart
This is a fork of AutoProxy, which can run the latest version of Firefox.
Thunderbird Are Go Requires Restart
This plays audio to boost emotion when Mozilla Thunderbird start up.
Mozilla Thunderbird Are Go!
Google Calendar - Quick Access
Quick Access to Google Calendar in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.
DOM Inspector Requires Restart
Inspect the DOM of HTML, XUL, and XML pages, including the mail...
Android Debug Bridge For Firefox
This addon adds some Android Debug Bridge access to Firefox. It requires access to the adb/adb.exe executable from the Android SDK.
Add-on Preferences Button
Displays a menu that allows you to open the option/preference window for any add-on that has one.
Skiff Mail
Integrates a Skiff Mail button into the Spaces toolbar. It opens the Skiff Mail website in a new tab.
Firedrive for Filelink Requires Restart
Add Firedrive support to Thunderbird's Filelink feature.
Larger Message List
Thunderbird 78+ extension that improves the readability of the message/thread list by using a slightly larger fonts and wider spacing in the folder tree view.
To create your own collections, you must have a Mozilla Add-ons account.