It's unusably slow on desktop Firefox with UBO active. This was not the case for a long time. They're degrading the experience on non-Chrome browsers intentionally.
I'm not experiencing that. Granted, I have 16 GB of RAM, and browsers are memory hogs, but my CPU is a Core i5-7600K with no overclocking, so not something super-strong.
Are you sure your experience is common rather than anecdotal?
