How can you be certain about Firefox? They did disable all addons due to a "failed certficate update" and then proceeded to bash Chrome for 2 weeks about a fake

How can you be certain about Firefox? They did disable all addons due to a "failed certficate update" and then proceeded to bash Chrome for 2 weeks about a fake story of adblocker addons being blocked, which turned out to be completely false, then they had two 0day exploits in 2 days. Same can't be said for Chrome or Chromium, which actually has video decoding hardware acceleration on Linux because they are more serious advocates for open source.