Currently PST issuer registration is being done through this Google Chrome repository.

We are observing that for issuers registered through the above repository, tokens are getting issued not just on Google Chrome but across other Chromium family browsers (like Edge, Chromium) as well. Can you please help with the below queries regarding this:

1. Is the Chrome repository extending support for browsers like Edge and Chromium by design?
2. If yes, what is the exhaustive list of such browsers which will be supported through Google Chrome issuer registration repository? Is there a way to recognize such browsers (perhaps through a set flag) ?
3. How do browsers other than Chrome fetch the key commitment? Is there an API contract with certain browsers as we see that other Chromium browsers like Opera don't fetch the key commitment registered through the above repository?