I tried it on a Galaxy Tab s5e and an LG v35, which have last year's mid-range Qualcomm chip and 2018's high-end chip respectively. On the v35 loading was slow,

I tried it on a Galaxy Tab s5e and an LG v35, which have last year's mid-range Qualcomm chip and 2018's high-end chip respectively. On the v35 loading was slow, and sometimes it would crash or make all my tabs blank until restarted. On the tablet it couldn't even scroll down a page without lagging. I haven't run into any other apps that do this on either device. Zooming was always laggy and a bit off--bad acceleration curves or something--enough that they've redone it from scratch for other platforms instead of trying to fix the code. There's a reason Mozilla is rewriting the whole thing.