it's deja vu all over again.
I had to replace my mouse. Went to a local white-box computer store to get the least expensive one in stock. I guess they all now have four possible "click points": the usual 'left click' and 'right click' on top but now there is a 'side click' on the left side and another one on the right side.
All sorts of terrible things were happening to me. Not only terrible, totally unexpected as well. I started losing files, losing pages, ending up (on the web) at totally unintended places.Duct Tape to the rescue!!!
I cut some 3x5 cards into thin strips and taped "sides" to my mouse to cover those clickers. Problem solved.
(I'm apparently in the same category as John's "older friend")