The web manifest's scope and start_url parameters are not really correct.

The scope should be a path starting from the site's root up to the forum's root. So example site urls and scope paths should look like:

url: http://myforum.com/index.php

scope: /

url: http://mysite.com/community/index.php

scope: /community/

 
Currently our scope's are looking like relative paths like ./../ which is not correct and is based on the location of the manifest controller (and also affected by app.php) rather than just a set in stone value - essentially what the script_path value is or would be if the user filled out that field in the ACP.