Drop-Down menus do not work in Firefox - when I click on a drop-down arrow, the list appears for a split second and then disappears - what could be causing this?
Drop-down menus do not function in Firefox - is there some type of setting that needs to be changed?
Start Firefox in Diagnose Firefox issues using Troubleshoot Mode to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes). See Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems and Troubleshoot issues with plugins like Flash or Java to fix common Firefox problems
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears. You can use "Disable all add-ons" on the Safe mode start window. You have to close and restart Firefox after each change via "File > Exit" (on Mac: "Firefox > Quit")
So I am supposed to spend hours trying to find the programming snafu here. I have been using Mozilla for over 20 years and if a fix for this isn't found I will be switching to CHROME.
Very frustrating problem, but my solution turned out to be a broken wireless mouse. I replaced the mouse and everything was hunky dory.