I don't think you can conclude that, at least not without playing with the definition of "malicious" which according to MW is "having or showing a desire to cause harm to someone."

If a typical engineer at Google, who is under the gun on schedule and needs to ship, prioritizes getting stuff working on Chrome which serves the vast majority of the market, and never ends up testing on FF (which may not even be installed on their machines), that's not the engineer "having a desire to cause harm to [mozilla]".

If you are arguing that the outcome is still the same, then I don't disagree, but even then still I think motivations matter for some things. Someone who accidentally hits a pedestrian and kills them is IMHO a different (and importantly different when it comes to meting out justice) situation vs a person intentionally aiming for and killing a pedestrian.