Performance improvements will not come magically just because they invented a new language and are re-writing everything in this language.

I know I sound like an asshole, but it's only because I think Firefox is my last chance for a free web and am disappointed with the route it takes.

I really wish they prove me wrong and in 2-3 years Firefox will be a marvel, re-written from scratch in Rust, but I am afraid that even if that's the case it will be too late.