Hi,

tjr: [...]

• Other: I am considering writing a tbb-dev proposal to increase the

max content processes from 4 to 999. This would increase memory consumption, especially for users with a lot of tabs. It would provide some small level of tab isolation at the process level, but only for new tabs opened, not tabs reused. The security gain contains a lot of "Well if the user does this, things are kinda better, but if they do this they're no better." So not sure if it's useful, the main draw is that it's a 4 character patch, so easy to do, just difficult to decide one.

FWIW, in Tails we had to decrease dom.ipc.processCount to 2 on systems with less than 3GB of RAM: https://bugzilla.mozilla.org/show_bug.cgi?id=1066789#c5