Today’s Nightly update (v54) comes with a nice feature: Two processes for web content.
Until now multi-process Firefox had just two processes, one for web content and one for the user interface. Today nightly enables multiple processes for content (two for now) and the idea is to increase this default number over time.
Here you have the bug about this change.
So I went bananas and since I saw it was working well I forced from about:config to use 10 processes instead of the default 2 (because why not?). The pref to change:
As expected the RAM usage is higher now (but still ok). Having a i7 machine the performance increase has been really big.
Note: Some users are not getting multi-process due incompatible add-ons, you can force it (at your own risk) by setting:
browser.tabs.remote.autostart a True
browser.tabs.remote.force-enable a True
Are you also playing with this feature? How is it working?