[daxelrod]

This is fantastic work that will greatly improve the security of Firefox; big thanks to those who have worked on it. Is there data on what effect it will have on memory use?

One of the primary reasons I use Firefox is that it uses significantly less memory than Chrome, and the entire OS seems to function better as a result (I've seen the most stark difference on macOS). I had been under the impression that most of the reason Chrome uses so much memory is its multiprocess model.

I understand that maybe we need to give that up for better security, but it would be nice to know if that's indeed the tradeoff being made here.

[virginia_a]

Yes, more processes come with the cost of more memory but we have reducing the process overhead in Firefox in order to minimize that cost as much as possible. We will continue doing memory reductions and will have numbers to report when we roll-out to all our users. Thank you for your continued support and use of Firefox.

[daxelrod]

Awesome! I'll look out for these numbers.

Do you need more data? If so, what's the best way for me to add to it? Would that be installing Nightly, setting fission.autostart to true, and enabling some telemetry?