Every single update since Quantum has made things worse. Three days ago I opened up Firefox to find out all of my settings had been nuked, 200+ tabs, themes and extensions lost, about:config reset, search settings reset (hello again Google) etc. I'm still fuming mad about this.
I don't feel like drudging up old history but my most recent bug was that Chrome doesn't properly bubble mouse click events when some UI elements fire.
WONTFIX of course, apparently I should just use event.preventDefault() even though every other browser handled this particular mouse event correctly. Chrome was the only outlier. So now I am writing code specifically for Chrome.
Two years ago I had an SVG rendering bug that turned out to be so deep that I had to spend two weeks debugging and come up with an incredibly convoluted scheme for loading dynamic SVG icons because `<use/>` is broken hot garbage on Chrome. Bug report dead in the water. More code just for Chrome.
You get the picture. I now have to develop on Chrome as much as I hate it, even though FF has better debug messages and stability, just because it saves time testing every little thing out.