> Our measurements and user feedback were all positive and so with Firefox 50 we deployed multi-process Firefox to users with a broader set of extensions, those whose authors have marked them as multi-process compatible. How can one check if some extension is marked as such? I'm using Firefox beta (which is now 51.0b9) and I noticed that Firefox now splits a separate "Web" process. Is that the indication that multipr…
If you are on an old version, check for the string "Multiprocess staged rollout". If it is true, you do have e10s enabled.
And for checking extension compatibility install this extension, https://addons.mozilla.org/en-US/firefox/addon/add-on-compat...