Little Ducky

Minor UI updates to page notifications.

Rename Handler.transformContentURLs to contentURLsToBlob.

Commands can now require being called with messageTopExtension. This is currently used for notifications and showXHRPrompt.

Allow $ in deep injected function names.

Break after 20 notifications in PageNotification.displaySomeOverflowed.

readyForPageNotifications is now called once the document becomes visible.

Add deepFreezeObject helper function to lock the JSB object in user scripts and specials.

Trigger Handler.visibilityChange on DOMContentLoaded.