Recently when I load FF, something is injecting what looks like a Yubi Key character string and DUck Duck Go searches for it on the net. I have no idea what is causing this. It happens without the Yubi Key being inserted so is obviously a stored set of strings. I tried clearing the cache and history, but it still happens. Also, for some reason I have to clear the history and cache very often or FF will time out trying to go to a new web page. Anyone have any ideas? System is I7 running Windows 11 pro 64. (kept updated) Avast Premium Security and Malwarebytes (both kept updated)