I just started using it for Android the last month or so when Chrome dropped the flag feature that let you toggle dark mode for websites with system dark mode.

I have a VPN with an adblocker so that aspect of Chrome never bothered me so much. Chrome felt like it worked slightly smoother but at the end of the day a browser is a browser and Firefox does the job. (Samsung's browser is actually surpringly good for those with a Samsung device looking for a Chrome alternative)

Firefox does seem more trustworthy overall, although I've learned by now that trusting tech companies is not a sensible thing to do.