I updated to Chrome 6.0.472.14, which has moved the context menu API out of the experimental. I ported my experimental context menus to the new API, but now my context menus wont appear on any "file:///" urls.
Any idea how to give permission for the context menus to work for file:/// urls?
This does not seem to work as a parameter to chrome.contextMenus.create:

Code:

documentUrlPatterns: ["file:///*"]

The scheme is technically file:// though I'm not sure if stating that instead will make a difference. (The third slash is to represent the root directory.)
It's worth a try.

Looks like it is no longer possible:
"Sorry, I should have given a heads up about this change. We decided to restrict context menu items to appearing on http/https pages only for now, but are considering widening that in Chrome 7 to allow file:// and chrome-extension:// (at least for an extension's own pages)." -Antony Sargent