Application Content URI Rule effects - Dave's Blog

Previously I described Application Content URI Rules (ACUR) parsing and ACUR ordering. This post describes what you get from putting a URI in ACUR.

URIs in the ACUR gain the following which is otherwise unavailable:

• Geoloc API usage
• Audio and video capture API usage
• Pointer lock API usage
• Web notifications API usage
• IndexedDB API usage
• Clipboard API usage
• window.external.notify access from within webview
• window.close the primary window
• Top level navigation in the primary window
• Cross origin XHR and fetch to ms-appx(-web) scheme URIs
• Cross origin dirtied canvas read access if dirtied by ms-appx(-web) scheme URIs
• Cross origin text track for video element for tracks from ms-appx(-web) scheme URIs

URIs in the ACUR that also have full WinRT access additionally gain the following:

• Cross origin XHR and fetch
• Cross origin dirtied canvas read access
• Cross origin text track for video element
• Local audio and video WinRT plugins work with media elements