Mobile sites, especially HN just don't work properly on HF. The simple act of collapsing posts often seems to overwhelm the browser on my Pixel.
Not to mention there's this bug where videos create notifications on FF Android, and these notifications keep your phone alive from the background, burning through an entire battery in 30 minutes.
OH, there's also the issue where mobile videos don't play in window, instead opening a new window to play... Highly annoying
Oh, and that thing where FF videos often don't show a bar for your time if the video is playing vertically
And maybe this is just my brain, but FF doesn't seem to detect the back button too well, necessitating many double clicks
Oh and the fact that it can't open Google maps links straight from the browser, yuu have to right click
So yeah, I've tried it and it's just not as good, not even close TBH