Hey, sorry to hear that it's not working. The plugin still works on my machine on Firefox version 115, so in order to fix the problem I'd have to know more details that will help me reproduce it:

1. Which OS and firefox version you are using (see Help > About Firefox for the version)
2. What steps did you take for using the plugin, and what you were trying to do.

Feel free to open an issue with the details in the GitHub page (https://github.com/mbrea-c/link-bulk-download).