While I appreciate your perspective, the widespread adoption of Google Chrome has presented challenges. The implementation of Manifest V3 demonstrates Google's significant influence over extension developers, requiring adherence to increasingly restrictive APIs or facing limited visibility within less popular browsers.

Extension developers are not forced to adhere to anything from Google to build compatible extensions that work on forks such as Brave. If they want to be in the Google ecosystem, sure, but as I pointed out, you can build your own ecosystem on top of it.

If you build on top of it, you're not forced and unable to extend the ecosystem.