a few weird bits to how to use it, like moving tabs by drag and drop is a bit un-intuitive, but it helps keep my tabs in order

ah yeah, so, the thing to improve performance is in the "system" menu of the settings, under "performance" and "memory saver"

i haven't actually had to use it because my pc has 64gb memory and rarely uses more than 20gb most of the time but for 8 or 16gb machines i can imagine it helps a lot, also you can whitelist apps to be able to run in the background, like email and such