Firefox fix for Meltdown and Spectre

If you believe Firefox "it’s fast. Really fast. It’s over twice as fast as Firefox from 6 months ago". 

It will be as fast as any browser soon.

But the main feature is fix for Meltdown (CVE-2017-5754) and Spectre (CVE-2017-5753, CVE-2017-5715):

See in deed. This post is written with Firefox 57.0.4...