FF57 has a relatively small amount of Rust (~160k lines of C++ replaced with ~80k lines of 10x faster Rust). Chrome is "pure" C++, though. More content process

FF57 has a relatively small amount of Rust (~160k lines of C++ replaced with ~80k lines of 10x faster Rust). Chrome is "pure" C++, though. More content processes wouldn't do much difference. It doesn't reduce the attack surface (potentially increasing it due to complexity), but only reduce amount of data per process in case you gain read-only access to its memory (which I can't currently think of as being an interesting attack). I would imagine that more content processes is about stability, rather than security. However, splitting larger processes into smaller ones can yield great benefit on the security front. EDIT: FF57 defaults to four content processes.