Quick thing which I think I've noticed is this appearing in the console bar:
"Denying load of chrome-extension://bknfklfehllgmnbmlhejjoalkimnikfc/jquery.min.map. Resources must be listed in the web_accessible_resources manifest key in order to be loaded by pages outside the extension."
I did get a warning message from Google about your maps dev key not being valid.
I have the same issue after installing the extension. Disabling it and the error message is not showing anymore, it's definitely coming from this extension.
No it's definitely from that extension. Goes away when the extension is disabled. I'm debugging a lot of javascript atm and the console now has that message in it even when testing on localhost. No biggie but does seem a bit odd.
"Denying load of chrome-extension://bknfklfehllgmnbmlhejjoalkimnikfc/jquery.min.map. Resources must be listed in the web_accessible_resources manifest key in order to be loaded by pages outside the extension."
I did get a warning message from Google about your maps dev key not being valid.