This add on can not be configured; there is not a vertical scroll bar in the right window. There is code for a vertical scroll bar but I am not sure what the difference from the horizontal code is to make it work. I did not want to leave you a review; I was hoping to find a way to contact you to give you some feedback and review your product once it was fixed. I open the source and looked at your add on; it seems to be broke in the manifest.json you have a deprecated entry and no ID entry. As for the options screen issue; I looked at the options html to see what it should look like and was able to go from there. I have manually patched the manifest.json and was finally able to configure the add on by adding web hook. The add on works great once you get past the issues.