Update on Multi-Process Firefox
https://blog.mozilla.org/futurereleases/2016/12/21/update-on-multi-process-firefox/ [blog.mozilla.org]
2016-12-22 01:15
Beyond Firefox 50, we have more work to do to enable multi-process Firefox for users with as yet unsupported extensions. In Firefox 51, if all testing goes according to plan, we’ll be enabling multi-process Firefox for users with extensions that are not explicitly marked as incompatible with multi-process Firefox.