Lower priority to P3. 
dominickn@, could you help triage this issue?

I believe there are good accessibility-based reasons for the prompts taking focus. Additionally, we do want users to make a decision on the prompt rather than ignore it.

The wider problem here is actually the site showing you an out-of-context, door-slam push notification prompt. That's actually the problem we're focusing on fixing: dissuading sites from such UX and prodding them to prompt for permission in-context and based on direct user intent. We're trying to make it less and less pleasant for sites which prompt out-of-context with features like permissions embargo (temporarily blocking requests that are dismissed 3 times).

 Issue 659486  has more discussion; we WontFix'd it. If you're happy with this response I'll merge into that bug, but if there's more you'd like to say please do. :)

SGTM, thanks.

I just ran into this on google.ca, with it asking for my location...

We have a train of things in motion specifically with default search engines and location permission to try and cut down the number of prompts shown. This work is under the Internals>Permissions>SearchEngineGeolocation component. We've also been working with the search team on this. :)