How can I prevent Tampermonkey from running on iframes?
E.g. I write a script for
// @include http://*.youtube.com/*
// @include https://*.youtube.com/*
The script will also run on external websites with embedded YouTube players. That's unneeded and even expensive when Tampermonkey fires 20 times on a page with 20 YT players.
How can I set the script to only fire when the surfed website is youtube.com?