Tab groups and non-independent tab muting (seems like it was domain-specific rather than tab-specific last I tried) are the two main things that kept me from switching back to FF as my primary browser (still use it for DTA, for example, but DTA got a big nerf back during the major extension overhaul, so that was a letdown). Tried some extensions, but none really worked in a way I considered usable and didn’t want to just keep trial and erroring through them given I already have a browser that functionally meets my needs, even if I’d rather not be using a chromium browser.
If native tab groups work well enough, I’ll probably give it another chance.