Currently if the grey list contains a wildcard entry it will be used when matching against the url list and therefore considered less precise. This prevents the following use case:

User doesn't care which browser opens most urls.
User wants example.com to open in the alternative browser.
User wants example.com/site to open in any browser.

To achieve that one would want to have the following policy:

url_list: "example.com"
grey_list: "*", "http://example.com/site", "https://example.com/site".

Currently the "*" entry shadows the other entries and thus they are not considered as more precise than the "url_list" entry.