I mean yes. I guess in theory it’s harder with open source but that’s something that’s hard to track with statistics I’d imagine. Well, intentionally placed backdoors at least are for sure are way more likely to be discovered in open source than closed source.

> But we were talking about regular GNU/Linux here, not android, right?

Firefox on GNU/Linux is the weakest form of the browser security wise by far, even as a flatpak, as Mozilla treats it like the lowest priority platform despite being the browser of choice by the average Linux user. Firefox on Windows and macOS has security features that are barely in the brainstorming stage on Linux (due to a multitude a factors, some probably not the fault of Mozilla).

On Android it’s still worse in security than Chrome/Vanadium/Brave.