Menu does not show reason for blocked "Options, Sync, Create Account"

[netjeff]

This is probably closely related to the #619 but the symptoms are slightly different, so I wanted to capture them. Feel free to close this against #619.

I run with "block all requests by default". I went to the Options "page", then chose "Sync". When I click on "Create Account" I get a blank page. The RP menu shows nothing at all. The request log shows a blocked request from about:accounts?action=signup&entrypoint=preferences to https://accounts.firefox.com/.... See screenshot.

I manually created a rule for origin scheme about and destination accounts.firefox.com, and things work fine now.

In some ways this is similar to #619 where menu shows URI without host as "null". I'm pretty sure that the origin about: URI is the source of the problem, but the menu does not even show "null". If this is close enough to #619, feel free to close this one.

[myrdd]

This is indeed closely related to #619, but I'd keep it separated, as #619 is more urgent (IMHO). So #619 is about requests to URIs without host, this issue is about the origin URI. Thanks for the report @netjeff.

[Marc05]

This is the same as #426 and is still a problem on Firefox 48.0

Adding the rule from *.firefox.com to *.mozilla.com fixed it.

[myrdd]

This issue had in fact already been fixed by commit 9854d0a, but now has been reintroduced due to a new domain. Thanks @Marc05 for posting here, and for mentioning the duplicate. A compatibility rule from https://accounts.firefox.com/ to https://accounts.cdn.mozilla.net/ will be included in the next version.