Question

My extension allows users to set their own background image on the extension’s page. It’s completely cool with online files being used; however, it gives me this Not allowed to load local resource: <file name> when using an image somewhere on their computer. Is there a manifest option or something else I’m overlooking to allow this?

I have already tried using the checkbox for “Allow access to file URLs”

Answer 1

One thing you may want to try is setting the file:///* permission in manifest.json (it is a little buried in the docs):

"permissions": [
    "file:///*"
],

I remember running across a similar issue before and this was the cause. Happy to troubleshoot further if this doesn’t solve it.