I'm sorry to hear this add-on does not provide the features you are looking for. What the add-on does is described fairly complete in the summary. The name of the add-on is very generic, so I am not surprised there are other add-ons that do something similar but have a different feature set.

I will check if it is possible to add the feature you mention, if it is possible with the WebExtensions API that would be a great addition.

Thanks for the suggestion!