I can imagine how frustrating it would feel as a Firefox dev reading reports like this and wondering wth is going wrong. Because I'm "just a user" and I've never seen FF being slow to start or loading pages.
Same with sync, I recently install Firefox on a new laptop. Clicked the sync button, logged in with my account and done. In 2-3 minutes all history and addons sync'd \o/
UX wise I really love that Firefox Android has the address bar on the bottom :D
Same. I use it hours a day. I don't get it. There is something broken or misconfigured on these users machines, at least from FF's position. I use it on Linux, windows, mac, and mobile with no issues except when I've enabled so much adblock stuff that I have to start backing it off for that website :) (only if I really, really, really need the site)
Same with sync, I recently install Firefox on a new laptop. Clicked the sync button, logged in with my account and done. In 2-3 minutes all history and addons sync'd \o/ UX wise I really love that Firefox Android has the address bar on the bottom :D
Except some Google stuff like the GCP console.
EDIT: formatting