This is from the Developers on Pateron from the 15th of august:

We would like to apologize to all supporters that this extension is currently not working. 😔

The reason is a technical innovation in the Google Chrome browser from version 127. 😟

With the Firefox browser you can continue to use version 3.5 of our extension, as Mozilla has not yet implemented this technical innovation. 😌

Unfortunately, important developers are currently on vacation to make the necessary adjustments. 🏖️

As soon as the core crew is back, a new version with some bug fixes and new features will be released. 🎁

With your donation you enable quick corrections and further developments of this extension. ❤️

We would be happy if you sent us your feedback to feedback@ms4yt.com. 📧

Thank you for your understanding. 🙏

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Sadly, as im writing this on september 1st 2024, The Extension doesn't work on Firefox.

I'm still giving it a 5 star review, its the least i can do since i cannot donate money atm.