In a sense, this feature/dialog is "close" to e10s as it's under the same umbrella at Mozilla, the "Snappy" [1] effort to work on performance. But it's not the

In a sense, this feature/dialog is "close" to e10s as it's under the same umbrella at Mozilla, the "Snappy" [1] effort to work on performance. But it's not the same: - e10s is about making each browser tab an independent process [2]. Some addons have glitches with it, but uBlock Origin is not one of them. - The feature you saw just proactively tells users about addons degrading performance and help them disable them or adjust their expectations. See [3]. EDIT hmmm, you are right, actually! The bug explicitly mentions the goal to "identify add-ons that are causing jank because of their CPOW usage", and CPOW is an e10s thing [4]. TIL, thanks :) [1] https://wiki.mozilla.org/Performance/Snappy https://wiki.mozilla.org/Performance/Snappy [2] https://wiki.mozilla.org/Electrolysis https://wiki.mozilla.org/Electrolysis [3] https://bugzilla.mozilla.org/show_bug.cgi?id=1071880 https://bugzilla.mozilla.org/show_bug.cgi?id=1071880 [4] https://developer.mozilla.org/en-US/Firefox/Multiprocess_Firefox/Cross_Process_Object_Wrappers https://developer.mozilla.org/en-US/Firefox/Multiprocess_Fir...