I can't with the people suggesting Firefox.
That's what I'm using, and gifs still freeze.
OP: are you leaving a page open in a tab for more
than 10 minutes? I have this theory that gifs freeze
when a page they're on has been open for too long.
(I know it sounds farfetched, but I noticed it some nights ago when I left a page open for 2 hours.)
This has nothing to do with my internet plan. It happens on the school wifi, at home and other wifis. The gifs are loaded, they're just frozen for some reason until you put your cursor over them.