The UI is much better and more intuitive than that of TemperMonkey.

I really like the distinction between CSS and JS modifications and that I don’t need to use “proprietary” GreaseMonkey functions like GM_addStyle (` /* the CSS goes here */ `).

FireMonkey also doesn’t exhibit the bug that TemperMonkey does — when I navigated the same portal over many pages, it seemed TM kept adding the same CSS script over and over, which, over time, slowed Firefox noticeably (after a while TM reported aplying about 70 scripts instead of 2!).

Seems like we can't import scripts from zip
Right, unzip everything and import works, but slightly inconvenient, thank you for replying.

Perfect better than the alternatives.

It is indeed super lightweight. A nice advantage to being on Firefox, as it's not available elsewhere.

I am looking for an alternative to Tampermonkey. FireMonkey looks promising. However, it does not support importing a .zip created by other managers. Therefore, I use Violentmonkey instead.

I've read https://github.com/erosman/support/issues/236

Since the only userscript managers that worked in Firefox Android (beta & nightly through custom collection) are this and tampermonkey, I choose this becase it's open source and more lightweight. Good job

This addon is nice, it's pretty simple to write js scripts with it, however I've struggled to write css scripts. I would assume that it shouldn't be too different from normal css, but trying to port my css scripts from stylus to firemonkey hasn't worked. There might be something simple I'm missing but I haven't been able to figure out what it is. I think the css documentation could be improved to make it easier to write css scripts.