Amazing app, does exactly what I hoped, paired with an additional app like Cold Turkey it is very difficult to bypass. Only concern is privacy as there are very few users, but it looks very professional and seems trustworthy.

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.