Sorry to hear that it didn't work, Just went through and re-tested the extension on the current Firefox version and it did work as intended.
If you can provide a bug report with details so I can figure out why at https://fraggy.dev/kick-vod-resume-ext/feedback, I've also added a doc about how Debug mode works here https://gitlab.com/fraggynz-public/kick-auto-resume-extension/-/wikis/Advanced-Debug-Mode