Looks like you messed something up, because it should.
https://www.reddit.com/r/privacy/comments/1ctxa3v/twitterxitter_is_now_broken_in_ff_when/
"Twitter/Xitter is now broken in FF when anti-browse..."
"x.com just doesn't work with the warning: "Firefox's Enhanced Tracking Protection (Strict Mode) is known to cause issues on x.com" They've also enabled some form of mouse based fingerprinting too, with spoofers like MouseVader leading to glitchy behaviour."
Are they somehow better? For me, they look pale, washed out, bright. Probably, because of my Titan oldie (made in Jan. 2013). But then again, H264 looks fine on it, please explain.