Error: NetworkError when attempting to fetch resource.

[WebMechanic]

Hey,

applies to the included "webextension-polyfill v.0.2.1" in your extension running in Firefox (all recent versions).

This extension constantly displays an error in the devtool console on every pageload 'cos the contained minified file browser-polyfill.js refers to a source map at the end, that is not available/provided:

Source map error: Error: NetworkError when attempting to fetch resource.
Resource URL: moz-extension://d16ad6d3-4448-41c4-9f70-77d1f14ed38f/browser-polyfill.js
Source Map URL: browser-polyfill.min.js.map

//# sourceMappingURL=browser-polyfill.min.js.map

First I disabled source maps in dev tools but the error message kept showing up and it took me ages to learn which extension eventually caused this annoyance -- the cryptic UUID wasn't helpful.
As much as I like the features the extension provides, I had to disable it for good because the "polution" was getting annoying esp. when I'm testing my own stuff.

I understand that the js file in question is from https://github.com/mozilla/webextension-polyfill and you're redistributing it. I presume you can remove this line from the source in your distribution so it would NO LONGER ask for sourcemaps ?!

Thanks.

[WebMechanic]

same here and agree.
It's not the only extension that used this Mozilla Polyfill and they all produce this warning and polute the console.