I installed this back in January, 2016, and it worked great until today, Sep. 1. I can open up a document on my computer and the scroll feature works on the document. When I go online, the scroll function does not work anymore. Why? Did Firefox change something in their browser? Is there a solution available? I have been so used to clicking and holding the left button and scrolling that way, and now when I click the left button, it goes back a page and the scroll doesn't work anymore.