Replaces img, object, embed, and CSS background-image *.mng references with animated canvas elements
MNG (Multiple-image Network Graphics) is an animation format from the early 2000s that lost native browser support and was largely forgotten. This script restores it by intercepting any `` pointing to a `.mng` file, fetching it via GM_xmlhttpRequest, parsing the chunk structure manually, and swapping it with an animated canvas — preserving the original element's size and styles. Works on page load and watches for dynamically added images via MutationObserver.
