Hi @saunders

I'm pretty low on resources, battery in a field and trying to fix a roof :)

So the obvious question is where is the the file [browser-polyfill.js]

I will look at the issue later but for now have you seen
https://stackoverflow.com/questions/48589592/source-map-error-typeerror-networkerror-when-attempting-to-fetch-resource-o

and

https://developer.mozilla.org/en-US/docs/Tools/Debugger/Source_map_errors

@amoun thanks for the links, but did not get content into a working fix.
take care on the roof ;-)

Hi
appart from another link https://stackoverflow.com/questions/54719661/failed-to-load-file-browser-polyfill-js

been reading https://support.mozilla.org/en-US/questions/1135322?page=2

can you tell me how you got this message, in the sense that something has been added before this error. Is it an updated Firefox, extension etc.

i.e. How do I replicate it ?

I currentky use FF 68.4.2esr

@amoun after having tried to fix Source-Map-Error moz-extension for hours, now I can not reprocuce it myself. Maybe it was caused temporarily by the browser Firefox 72.0.2. After restarting the warning is gone.
So far. the problem has gone for the moment; I hope it stays that way. Otherwise I'll come back to this thread to ask for you advice.
I'm very sorry that I have bothered you with this. Thanks to your support
Regards,Will