So this is essentially the same as man in the middle attacks but your basically saying here are all my keys. Scary. They better step up security on the extensions review process.
I've already dumped chrome/Google because it tracks everything possible about you, especially when signed in.
Have you tried using Chromium? (I still recommend Firefox though)
Chrome is basically a stable release from Google of the Chromium Browser (which in itself is an Open Source Project), as such Chrome is more tightly integrated with Google Services, Chromium should be the better choice considering not wanting to be tracked.
I think some systems (*BSD, GNU/Linux distributions) even only have Chromium available through their package systems, others possibly both.
I'm using Ghostery browser on Android now. But I'm even paranoid of Android since you are always logged in. I was trying their ext with chrome to block trackers, some large business sites, I think business insider, have over 80 items blocked.
This type of behavior is going to cause people to disable js entirely.
I've already dumped chrome/Google because it tracks everything possible about you, especially when signed in.