They really want to be TikTok so bad. But hey, at least TikTok doesn't run like garbage on non-Chromium browsers, so maybe they should work on fixing that next!
Most of the ads I experience are pre-roll. In FF videos don't autoplay, so I just press F5 a few times until the garbage is gone. If an ad pops in the middle of something, I typically close the tab and find something else to listen to.