Simply mandatory to help make web apps used for the job bearable.

Unfortunately not open source and complex, which may mean that enterprise users may not have permission to use it as enterprise IT departments are tightening their security policies.

And unfortunately, there is another extension of almost identical name ("Tamper monkey" which even uses Tampermonkey's icon/logo), which may trick people into installing the wrong extension. While I have reported this, I think the author of this extension should have more luck to get Mozilla to ban that other "fake" extension.

Use “Greasemonkey” or “Violentmonkey”, both open‑source, whereas “Tampermonkey” is closed‑source.

The editor is extremely laggy on Android.

Goods

It would be wonderful if you could backup your scripts before a creator updates them andTampermonkey updates them WITHOUT AUTHORIZATION! I can't get the first version of a script anymore, because the creators of this extension must think that everything that is updated is better!

Helped me.

Most convenient userscript manager for Firefox

Well-designed addon, but I find that it's a shame for it to have gone closed-source 10 years ago. No thanks, I'll switch to ViolentMonkey, which I can read the code of and modify as I please.