I have tried installing on Firefox on Windows 10 system and it won't install claiming the extension is corrupt. I doubt the extension is corrupt as others are able to install. Might be my OS. Still, I can't give higher stars to something I have yet to be able to use.

还好吧，正在研究。

Do the job, but:
1. settings are not retained after a browser restart.
2. sometimes the plugin use 100% of the cpu and the only way to kill it is to restart firefox. This is super annoying.