Скачивание музыки с сервисов Яндекс.Музыка и Яндекс.Радио
Extension Auto-Installer is a helper for Firefox/SeaMonkey/Thunderbird extension developers: it allows automatically adding or updating browser extensions, e.g. via command line tools. This makes testing your changes easier.
Restyle the web with xStyle, a user styles manager. With xStyle you can install themes & skins for many sites and create your own.
Adds a new page that shows add-on memory usage
Material Design 风格的辅助翻译扩展，可切换 Google 翻译、有道、百度三种翻译来源，支持 Windows、Linux、MacOS。
Now that we have contextual identities, wouldn't it be nice to move a tab from one identity to another, or from default to a container?
I want to do that. Now I can.
Adds an error console in the browser
Speed Dial integrated with your bookmarks. Based on Speed Dial (Lite) by Mark Lumnert
Save your groups of tabs so you can restore them later in a new window.
You can edit saved tabs groups by adding, deleting or changing the url for each tab.
Replace your new tab page with a personal dashboard featuring to-do, weather. daily inspiration, and more!
Press Alt+P to toggle the pin stat of the current tab
Add a badge to the toolbar that shows the number of currently open tabs in a window or all windows.
Convert YouTube, Vimeo, Facebook and more Videos to MP3, MP4.
This addon use 3rd party Website https://www.ytomp3.cc/ for this Service.