The Chrome storage API allows settings to be synchronized through Chrome sync and the extra permission doesn't cause warnings. Requires code for migrating settings from the local storage though, and whether syncing preferences is that useful should be investigated:
The Chrome storage API allows settings to be synchronized through Chrome sync and the extra permission doesn't cause warnings. Requires code for migrating settings from the local storage though, and whether syncing preferences is that useful should be investigated:
http://developer.chrome.com/trunk/extensions/storage.html
Edit: Looks like the sync feature has limitations that might make this unfeasible for now, at least.