Top-Rated Extensions
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ICS Inspector Requires Restart
This extension provides many debugging options related to calendar development. This includes showing the ics data for an event or calendar, evaluating javascript on an event or calendar, and some menu options for debugging.
GmailOutOfOffice Requires Restart
Out of Office for Gmail
This add-on allows you to set an out of office auto-responder in your gmail account. It adds a button in the toolbar customization list.
Lightning Reminder Left Buttons Requires Restart
Tired to mistakenly press that "Dismiss All" button? Move the Lightining Reminder "Snooze all for" and "Dismiss All" buttons to the LEFT!
... and from version 2.0 you can keep them on the RIGHT, but swapped!
OpenFolder
This add-on makes it easy to open folders on a file server.
In order to use the add-on, you need to install two things: the add-on and the linked app.
You can download the linked app from the following website.
https://openfolder.net/
Night and Day Dynamic
A theme that switches between sun and moon based on time of day.
This is the canonical example dynamic theme published by Mozilla: https://github.com/mdn/webextensions-examples/tree/master/dynamic-theme
Slack - Quick Access
Quick Access to Slack in a new tab with just one click on a simple, stylish icon button on your Spaces toolbar.
mouseless Requires Restart
I did my best so that operation might be possible with a keyboard...
Classic Pop-up Alerts
This addon returns the old view of the pop-up notifications, as in Firefox 4.0 - 43.0
Large Fonts Requires Restart
This add-on enables you to change the font size of the plain text editor of Thunderbird.
gTimer Requires Restart
gTimer предназначен для подсчёта времени, проводимого за работой в Firefox.
Email Addresses in Message Headers Requires Restart
Shows email addresses in message headers, including those of contacts, and provides control over message header presentation.
Folder Selection (Thunderbird) Requires Restart
A popup window for selecting any folder when the folder pane is hidden...
Google Mail Tab for Thunderbird Requires Restart
Open Google Mail in a new tab inside of Mozilla Thunderbird
Follow Reply Requires Restart
Find the replying or the following mail you wrote by clicking the arrow icon in the subject column of the thread panel
SmartProxy
SmartProxy is a smart automatic proxy switcher that will automatically enable/disable proxy for the sites you visit, based on customizable rules.
RSS Dashboard Requires Restart
This addons gives you a dashboard-style view of your RSS feeds, like iGoogle or Netvibes (widget view). This is an experiment, so it is still very rough. Right now, consider this as a proof-of-concept rather than a real addon.
To create your own collections, you must have a Mozilla Add-ons account.