Comment 83 for bug 604635

Is the "wakelock" API exposed to content on desktop Firefox? It seems very phone/B2G specific at the moment.

Strictly from a desktop/content perspective, it would be handy if the API to disable the screensaver was exposed as a simple CSS property, much like the cursor:none CSS property.

Then I could have a simple rule such as:

video:-moz-full-screen {
  screen-saver: none;
}

And then not have to worry about the screen saver kicking in while watching a full-screen video.

Or even something more general like:

video:not(paused) {
  screen-saver: none;
}

It's considerably easier to implement this functionality compared to munging around in C++ (or JS even) to toggle the screen saver at the appropriate times.

This also means web developers (and us implementers!) don't need to remember to unlock() or (re)enableScreenSaver() when the screen-saver-disabled document has been gc'd; it happens automatically when the rule no longer applies.