So switch then instead of just talking about it. It's not a big deal, it takes like 1 minute, and no one can seriously tell me you have a significantly different browser experience on Chrome vs FF.
It doesnt take 1 minute and yes the FF experience was significantly worse when I tried it.
Here's one example. I write almost daily in 4 languages on the web. With Chrome I get multilingual spell checking automatically in those 4 langguages without having to do anything. Even in the same <textarea>.
With FF you have to manually install dictionaries and there was even a 23 year old issue (yes, 23 years) about using multiple dictionnries at the same time. This issue was only closed 2 months ago:
Other than this ad stuff (which I agree is tremendously hostile) Chrome has acually been getting better. The dev tools, performance, UI, and memory usage have improved considerably this year.
I assume you have good intentions and want to advocate for Firefox and have it have wider adoption. I want the same thing, but it's imo not enough that Chrome gets shittier (it doesn't in my opinion btw in terms of UX), Firefox needs to become better to win.