Nobody attacked Firefox successfully, but that's hardly a point against it. I don't know what "made no improvements at all in previous 2 years is supposed to mean", either, since we had just released a major overhaul of the optimizing compiler a few months before Pwn2Own: https://hacks.mozilla.org/2020/11/warp-improved-js-performan....
Uh, [citation needed]?
Firefox was a valid target in Pwn2Own 2021: https://www.zerodayinitiative.com/blog/2021/1/25/announcing-...
Nobody attacked Firefox successfully, but that's hardly a point against it. I don't know what "made no improvements at all in previous 2 years is supposed to mean", either, since we had just released a major overhaul of the optimizing compiler a few months before Pwn2Own: https://hacks.mozilla.org/2020/11/warp-improved-js-performan....