Yeah, the Chrome store policies (https://developer.chrome.com/webstore/program_policies) do include a note that almost certainly kills this:
"We don't allow content that harms or interferes with the operation of the networks, servers, or other infrastructure of Google or any third-parties."
I think Chrome Extension distribution outside the Chrome store is more or less blocked, so that's that.
A FireFox version would probably be fine though, assuming this doesn't actually break any laws (IANAL, but I'd be surprised).
Alternatively, you could build exactly the same thing as a standalone program on your computer that does this as a local proxy, or even by building something like pi-hole (https://pi-hole.net/), to automatically break analytics data from everybody on your network.
- Sends fake data through chrome (a google arm)
- To google analytics (a google arm)
- To ruin googles data (its core business)
You tell me whether that's going to work at scale.