Specifically downloads, or just pages?
I rarely actually download anything on my mobile browser, so I couldn’t say for that.
After the upgrade there seemed to be a 50% chance of pages failing to load with the loading bar getting stuck about 25% of the way across the screen.
It seems like that got fixed though as I haven’t had it recently.
TBH though, since i’ve started cycling to work I rarely use my mobile browser these days.