Firefox - Webrender

Enable WebRender in Linux.

Debian 9 - Install Latest Firefox

Install a much later (faster) version of Firefox in Debian 9.

Ubuntu 16.04 - Install Firefox Nightly

Install and run Firefox nightly in order to see the benefits that will eventually make it into the released version.

Firefox - Change Number Of Content Processes

Firefox - Check Multiprocessing Support

Resolve Firefox Slow Startup

Discover a workaround to ensure opening up Firefox is always almost instant.

Firefox 50 - Tab Cycling

Customize Websites With Dotjs

Useful Firefox Addons

A list of some useful Firefox addons that I personally use and recommend.