Open Web Developer Tools Icon not working

Since the last FF update I noticed that the web developer icon (wrench) on my toolbar doesn’t work. The drop down from the icon is blank so I have to go to Tools/Web Developer to use it. Any possibilities of the icon working soon?

I just gave it a try on the latest version of Firefox Release and the button appears to be working correctly. Which version of Firefox are you using?

It is working now on both of my computers. I am using 68.0.1. Thanks for replying.