This is the most slept on add on in existence. It's amazing. And the best part is the developer: This add on used to only be available on Chrome as an extension. (It is also slept on there, btw) I'm a Firefox user, obviously, so I wanted this to be available on Firefox. I messaged the developer, Sameed, and after some talking he was on the job. The very next day, he messages me saying:

Hi, hope you are doing well.
This was a tough one but happy that after several revisions I was able to get approved.
*link to the add on*
Let me know if you have any questions or concerns when trying it out.

Amazing developer, amazing tool, try it out now.