Changes

As of Firefox 54+ (early 2017), our Multi-Content process model is currently being tested on Nightly (2 4 processes). Four content processes will be enabled on 54 Aurora and if stable enough, we will begin to roll it out in Firefox 54 Beta experiments. The schedule below covers the rollout to release for both e10s single and e10s-multi. View the [https://wiki.mozilla.org/Electrolysis/Multiple_content_processes Multiple Content Process] wiki page for more information about release milestones, release criteria, and a gradual roll-out schedule.