Firefox 43 Now Officially Available, But GTK3 Gets Disabled

[liam]

If you're feeling a bit adventurous, and are on the Nightly channel, try setting the env MOZ_USE_XINPUT2=1
For me, it makes an ENORMOUS difference. Two big things: smooth scrolling works (not the emulated version, but the real, lag-free native experience), and touch FINALLY works (pinch to zoom doesn't work, but you can at least scroll with your finger, and it has momentum).

[Wilfred]

Hi, for me ffmpeg is enabled by default in FF43, also all boxes here are finally blu by default https://www.youtube.com/html5

But firefox in html5 still doesn't support vaapi. FFmpeg does, so this is somewhat puzzling. And no, chrome by default also doesn't support vaapi. :-(
So I still use flash, since flash is faster than firefox/html5...