Constant drop down menus
I am constantly getting drop down menus when I am on my MAC. If I click a link on a page, I get a drop down menu. It takes constant clicking -- going off the page and clicking -- and if I'm lucky, it eventually goes away and I can go ahead and click the link I was wanting. This has just started in the last year or so. It's getting worse and worse. I've tried the suggestions regarding Preferences, Accessibility, etc. None of that works. Any ideas?
iMac, macOS 10.12