Recently tried moving from Chrome to Firefox, and found that on some websites, Firefox bogged down like I'd never seen it do on Chrome, to the point of making some sites like Mastodon Advanced Web interface, and Tumblr, unusable, no matter what I did. Downloaded Brave after seeing this post, imported all my settings, and both those above mentioned sites are behaving normally again, so until Google does something to break all chromium bases browsers I think I'll be checking out Brave for a while, really wanted Firefox to work, but it just didn't
A sidebar on some service's website wouldn't scroll on Firefox and I got an arrogant response from the devs, basically “we test on Chrome and Safari, use a mainstream browser”. Too bad I didn't know enough HTML back then to recreate the div and report the issue to Mozilla.