I updated the Glowforge Beep Enhancement extension. If you’re using Chrome and want a sound to play when your Glowforge is ready to print (or has finished starting up, scanning, etc.), you can install it from the Chrome web store here. This extension has been broken for a while due to a change on the Glowforge web site; this update unbreaks it and updates to meet future extension requirements for Chrome.
Updated the post above to reflect that the extension is available in the Chrome web store. I recommend getting it from there rather than installing in developer mode, since it’s easier and you will get automatic updates in the future.