Highlights games you already own on Steam, on other sites. Modified from https://greasyfork.org/scripts/16105-bundle-helper/
To use this script, click the "Mark Owned" button that appears at the bottom right of the page. Games that you own will be highlighted in green.
The script caches your steam profile information (from https://store.steampowered.com/dynamicstore/userdata/) and refreshes it after 15 minutes. You will need to be logged in to Steam for this request to work
The fanatical "pick-and-mix" page may require the React Dev Tools addon (https://addons.mozilla.org/en-US/firefox/addon/react-devtools/) to work correctly
This script was modified from https://greasyfork.org/en/scripts/16105-bundle-helper