[tech_dreamer]

I have Firefox and Firefox Developer Edition installed on my machine, though my primary workhorse is Chrome Canary(i trade privacy for efficiency and experience). First of all playing video in Firefox is jittery and I could hear fans spinning - I don't have any problems in Chrome or Safari. Rust is Mozilla invented language and they are not using it in Firefox for their advantage.

[viraptor]

From Safari I expect you're on a Mac. In that case either wait for release 70 or install beta. (And possibly enable webrender as well) The difference is massive in both cpu and energy usage.

[franga2000]

Mozilla is certainly using Rust in Firefox. Servo is written in Rust and more and more components from it are getting plugged into Firefox (Quantum CSS comes to mind).

[alt_f4]

check out ungoogled chromium if you'd like to trade a very small amount of convenience for full privacy