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Is this satire? Rust eliminates memory errors such as use-after-free. Unlike C and C++, `myVec[usize::MAX]` will `panic!` if `myVec` isn't actually that large.

It depends a bit on your definition of "crash".

Rust has a `panic!()` macro which will hard-terminate the program and log a stack trace in what is functionally equivalent to a crash. It can be called in various scenarios... including out-of-memory situations (like the ones being addressed in the fine article and this thread).

Very small (but important) parts of firefox are written in Rust

And even if Firefox was written in 100% Rust, Rust can still panic for logic errors. And system libraries have their own bugs and crashes that can bring down Firefox.

It is 9.5% of the total code base, that’s even counting things like tests. I wouldn’t personally call that “very small” but ymmv.

That also said your parent equating memory safety to “no crashes” is also not correct. A process can exit early while never violating memory safety.