Is it possible, by any chance, at some point, to get something like uBlock's procedural cosmetic filters for our UserCSS scripts? CSS is great, but it's a bit lacking in functionality, especially in regex support.
I'm only starting to learn JS, and I imagine it's gonna take a while before I'll be able to write the scripts I need.
Thanks for all your hard work!

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Nothing works properly both user-Scripts and user-Style are broken especially any .css seems to not being respected

I wanted to like FireMonkey, but unfortunately it seems to be incompatible with the vast majority of scripts I use with the Waze Map Editor downloaded from greasyfork.org. There are no JavaScript errors -- the scripts just do nothing. They are listed as active on the page, but something about them just doesn't work with this addon. So I'll have to switch to a different one.

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!).