Earlier quoted context omitted.
Mozilla uses AFL, which is a genetic algorithm that tests code paths. They are also transitioning to Rust, which will give them a much bigger safety guarantee over most of their code and a much smaller audit surface for the rest.
Mozilla is good at everything except making browsers. rr is the best debugger I've used. I wonder if there's a way for them to monetize Rust. It seems impossible to monetize a programming language without owning a platform e.g. Microsoft (*.NET), Apple (Swift), Borland (Delphi), JetBrains (Kotlin). FirefoxOS for mobile with Rust as the first-class citizen would have been huge for them. Maybe it's not too late. Take n…
Quality and popularity are rarely correlated, but such metrics are even further confounded when you have monopolistic factions like Google and MS pumping huge money into user acquisition for their competing platforms. It's ridiculous to imply that Firefox is being rejected by users just because Google has been dumping millions into getting people switched to Chrome (and doing so not only with marketing dollars, but increasingly with bully tactics).