Use LessPass add-on to generate complex passwords and log in automatically to all your sites
Download YouTube videos in all available formats and extract the original audio files
Displays country flag of website's server location, Whois and Geo info on a browser addressbar icon
Save frequently-entered text for pasting later.
Tomato Clock is a simple browser extension for managing your productivity.
Block distracting websites when you are browsing the web. You can list websites that you don't want to visit in the settings. You can pause or turn off the blocker quickly. Completely open source.
擁有大量有趣的功能增進您的 YouTube™ 使用者體驗。
YouTube with more freedom
Lets you fix annoying sound problems in YouTube videos and such. Like audio in one channel only, too quiet or too loud. (Unfortunately, doesn't work on many other websites because of cross-domain issues — but it does work on YouTube.com!)