Latest Firefox version constantly opens tabs from my dials automatically, can't find old version

I have one Windows 10 machine, FVD Speed Dial constantly opens a new tab in the task bar as it traverses my URLs, closes the tab, opens a new one (in Firefox), etc.. I was once directed to a v 23.3.1 page by support but now that page has the latest version on it, 62.6.7. So, must delete the add-on permanently it seems.