[foob]

Yikes! I'm one of the maintainers of the Remote Browser open source project [1]. It's a cross-browser compatible automation framework which heavily leverages the power of vanilla JavaScript and the Web Extensions API to offer features comparable to those of Selenium (without the legacy cruft). Removing the ability for extensions to interact with arbitrary pages would effectively break Remote Browser's compatibility with Chromium/Chrome overnight. I have a feeling that there are a staggering number of interesting extensions that will break due to the various V3 manifest changes. Hopefully the outrage over uBlock Origin will push Google to reevaluate this decision.

[1] - https://github.com/intoli/remote-browser/

[mrieck]

I made an extension called the "Productivity Owl." It only has 10k users, but the owl would definitely be dead with this change.