I'm not talking about an extra 10-15sec, but easily 2-3 full minutes (I've sat here with a timer checking) to load pages, sometimes not loading them at all. Particularly with login pages, but even just homepages.
Dropbox, Cloudflare, Various companies forums, My bank, Google; each of these sites and more I've had firefox either not load at all, or take so long I've been able to copy the link into Chrome, do what I need there, then come back to Firefox still 'loading' a blank white page.
I just don't understand. I want to migrate away from Chrome and use Firefox, but it's been unusably slow when it even loads anything at all.
P.S. In the time I've taken to write this (~5min) plus the time to decide to post and find this community firefox has still not loaded my cloudflare dash... (typed in the address, waited a while, gave up and came here but left it open)
/edit: I should note I have ublock installed, but I get the same results with it disabled most of the time.
Do you have multiple tabs open or other apps running in the background? If so close them all and retest.
Try restarting your phone and see if that improves the issue as well. That phone has 4GB of memory most likely which can hinder multitasking.