go to Control Panel -> Mouse Properties-> Pointer Options -> Remove Checkmark from Display Pointer Trails -> click OK

Check and tell if its working.

Thanks for the suggestion. But the display Pointer Trails box was not checked. Any other suggestions?

-> Start Firefox in Safe Mode by Holding down SHIFT key while Starting Firefox.

-> As an alternative method, press Win + R keys and enter the following in the Windows Run box:

       firefox -safe-mode
                      OR
       "C:\Program Files\Mozilla Firefox\firefox.exe" -safe-mode 

-> Firefox Safe Mode window will appear. DON'T SELECT ANY OPTIONS, just click Continue in Safe Mode button

Firefox will now open up with just basic Firefox. Now do this:

-> Update ALL your Firefox Plug-ins https://www.mozilla.com/en-US/plugincheck/

-> Tap ALT key or press F10 to show the Menu Bar

-> go to View Menu -> Zoom -> click Reset -> Page Style -> select Basic Page Style

-> go to View Menu -> Toolbars -> unselect All Unwanted toolbars

-> go Tools Menu -> Clear Recent History -> Time range to clear: select EVERYTHING -> click Details (small arrow) button -> place Checkmarks on Cookies, Cache -> click Clear Now

-> go to Tools Menu -> Options -> Content -> place Checkmarks on:

1) Block Pop-up windows 2) Load images automatically 3) Enable JavaScript

-> go to Tools Menu -> Options -> Security -> place Checkmarks on:

1) Warn me when sites try to install add-ons 2) Block reported attack sites 3) Block reported web forgeries 4) Remember Passwords for sites

-> go to Tools Menu -> Options -> Advanced -> Network -> Offline Storage (Cache) click Clear Now button

-> Click OK on Options window

-> click the Favicon (small drop down menu icon) on Firefox SearchBar (its position is on the Right side of the Address Bar) -> click Manage Search Engines -> select all Unwanted Search Engines and click Remove -> click OK

-> go to Tools Menu -> Add-ons -> Extensions section -> REMOVE All Unwanted/Suspicious Extensions (Add-ons) -> Restart Firefox

You can enable your Known & Trustworthy Add-ons later. Check and tell if its working.

Thanks. I got as far as updating the plug-ins. But I have searched and can't find View Menu. Is there a hidden menu or toolbar? I appreciate your help.

-> Tap ALT key or press F10 to show the Menu Bar

Follow all the steps mentioned after the Plugins Check step.

Thanks for the detailed instructions. I followed them all except I couldn't find the "favicon" on the Firefox Search Bar. The only small downward arrow on the right side of the address bar opens a list of frequently searched websites. But the rest of the instructions seem to be helping the problem. Can you help me find this last piece? Thanks.

There are two Favicons (small drop down icon) on the Navigation Toolbar

First is on the Location Bar (where you type website addresses) Second is on the Search Bar (where you type keywords for Searching using Search Engine currently selected -> default is Google)

-> click the Favicon (small drop down menu icon) on Firefox SearchBar -> click Manage Search Engines -> select all Unwanted Search Engines and click Remove -> click OK

Screenshot of SearchBar Favicon is attached. Check and tell if its working.

Thank you very much for all your help. The problem appears to be solved.