So Google is going to help me have more privacy by preventing me from letting extensions I want to run from having access to data I want that extension to have, so it can do a job I want it to do. Meanwhile, Google's software will of course have full access to everything I do online, and most of my data will live on Google servers. And the extension that I want to have access is also downloaded from Google servers. And the extension is open source, so I can totally check it for problems, or believe people I trust who vouch for it. Of course, I can't do that with any of the code on Google's servers, where basically everything I do all day, everything I read, everything I search for, and all my emails and documents are.

Got it.