Multiple content procces - how is default calculated?

[CorvidaeCorvus]

How does FF's multi-process architecture ("MPA") decide how many content processes to allow, 1-4 by default? If MPA is the component that does this. My default is 1, sad!

[WaltS48]

I don't know how it is determined.

I was testing a site in my Firefox Nightly yesterday, in a new profile with no extensions.

I had 4 content processes running (default for Nightly), one was the Firefox application, one was the tab with the site, another appeared to be the plugin-container and I have no idea what the fourth process did. Maybe just waiting for another tab?

[the-edmeister]

https://developer.mozilla.org/en-US/Fir ... ss_Firefox

The older non-SDK Legacy extensions are typically why multi-process is disabled.
https://developer.mozilla.org/en-US/Add ... ss_Firefox

.

[CorvidaeCorvus]

https://developer.mozilla.org/en-US/Firefox/Multiprocess_Firefox

The older non-SDK Legacy extensions are typically why multi-process is disabled.
https://developer.mozilla.org/en-US/Add ... ss_Firefox

.

Ok, I'm running AdBlock Plus, currently in legacy (compliant coming at some point).

Still curious as to how it functions with no limiting legacy add-ons.

[Brummelchen]

any not-e10s-compliant extension will lead to to deactivation of multiprocess.

some extensions are combined - will share a process, and firefox will put up to 4 tabs on a process.
(compare: chrome will combine extension also to process but each tab get its own process)

you can change the number of processes.