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

This is so funny to me. Coming from a Netscape Navigator world, when extensions first came out, they were supposed to allow the user to add functionality to websites.

Why would someone install "random extensions" that they dont trust. And also, what would extensions do if not read and write data to websites? .

Sign of the times I guess.

> Why would someone install "random extensions" that they dont trust.

Same reason why people download random stuff and run it with administrator permissions on Windows.