The entire argument regarding security doesn't mention any of the reasons Chrome developers cite its security improvement, instead it brings up that Firefox "does good enough already" and that malicious extensions can still get past the review process. the review process is by itself improved with V3 as extensions that pull in code remotely can no longer get past the review process[0], especially with how many current extensions implement RCE C&C intentionally. They also say extensions are "usually interested in simply observing the conversation between your browser and whatever websites you visit" - that's 'usually', though; malicious extensions intercepting and modifying requests for their own benefit isn't unheard of.
Instead of only stating 'this is bad', it would be beneficial to include both (A) what they say (B) their basis for the decision, if any (C) why that line of reason is incorrect/deceiving.
0: https://developer.chrome.com/docs/extensions/mv3/intro/mv3-o...