So far the best browser feature! And it's optional in form of extensions. Just take my money!

There's no way to use this extension. It doesn't install a toolbar icon, nor is there one available anywhere. Also no new right click menu items show up.

It's one of the best features in FireFox. Very useful. I wish there was more icons and colors to choose.

A bit tricky to deal with at the beginning, but really useful!

好用的扩展，但是中国大陆无法使用。

These are so hard to work with. They sometimes break sites in really obscure ways that are hard to fix. It would be so much better if Firefox had proper support for profiles

A must have add-on for those who manages multiple cloud-providers accounts.

It's amazing. I feel safer navigating the internet, knowing that I can keep my private life separate from my work life, and that Google and other soul-extracting businesses are not in my business.

Pretty useful for access domain with different http proxy. I hope developers add socks5 support.

I like it. Good for organisation