Rust is not Firefox. Rust does not disallow crashes, it disallows that your code will run in unsafe manners, either with compile-time errors or runtime panics

Rust is not Firefox. Rust does not disallow crashes, it disallows that your code will run in unsafe manners, either with compile-time errors or runtime panics (with some exceptions for `unsafe` code). Browsers are to some extend more complicated than the operating system they run on, so it's no surprise that there are bugs in there. If you experience crashes, please do submit the crash reports, and if you already know what the cause of the crash is, please file a bug on bugzilla. Thanks!