> I want my browser to prevent random extensions from directly reading web page data.

I don't want that! I want to be able to install any extension whatsoever (as we still can, more or less, install programs). And if I'm clueless enough to install "random" extensions that'll harm me, then shame on me! How often has it happened for the whole existence of Manifest V2 anyway?

Maybe we could have tolerated a well-hidden, well-protected "advanced" flag to open that possibility. But removing Manifest V2 altogether is unforgivable.

Also, security is a very very very weak argument, as many ads are much more dangerous and toxic than any popular extension will ever be.