I’m disappointed :-( Based on the title, I was hoping there was now a way to animate my desktop background / wallpaper!

You know this works in any browser that allows keyword mappings for bookmarks right? You can do the same for Firefox - just add a bookmark like listed above & add a keyword to the bookmark keyword field... then just type your keyword & your search terms into the Firefox URL bar & viola! Same result...

Never mind... see my own question answered already in the comments!