Firefox won't open sometimes  

Hi All,
Windows 1809 has gone weird on Firefox sometimes and displays a popup window stating "Can't open this item"
I always have my browsers pinned to the taskbar and every so often when I click on the firefox icon on taskbar i get a popup window. I am attaching a pic. Hopefully it will upload here.
I can go into the start menu and scroll down and click on firefox and it works fine but not from the taskbar every so often. I have to pin the firefox to taskbar again and I cannot remove the original one. when I right-click on it i have the option to open firefox which again brings up the window or pin to taskbar...which don't work. The new one I pinned to taskbar works fine. So now I have 2 and only one works lol
Anyone experiencing this problem also?

Sorry about the pic sideways. It displays fine in my viewer but went sideways when uploaded

Only way to remove the firefox icons was to uninstall firefox and reinstall, Seems to be working so far until next burp lol