None of us here can replicate the issue which makes us think this is an
issue specific to your machine. Let's try one more thing, can you right
click on AEP Debugger and click "inspect" then click on the "console"
tab. Then, while Debugger is connected to a tab, refresh that tab and
see if any errors are thrown. Please share a screen shot of what you
see. We also have a Firefox version that you can install here, maybe try
this one?
mozilla:https://addons.mozilla.org/en-US/firefox/addon/adobe-exp...