Totally missing the point that with mutli-process browsers, I can manage the browser better because I can:
1) See which tab is using excessive memory
2) See which tab is using excessive CPU
At the moment the only option to conserve battery life on a laptop is to close Firefox or minimise tab usage. That's user unfriendly bullshit.
The other major point is that multi-process browsers are more secure and more robust. Mozilla devs have never seemed to like thinking beyond monolithic processes though (I've had this argument with them for years from before Firefox and Thunderbird showed that mail and browser didn't need to be in the same process space). Architecture doesn't seem to be a strength of the Mozilla devs does it?