[javascript] DevTools failed to load SourceMap: Could not load content for chrome-extension

I appreciate this is part of your extensions, but I see this message in all sorts of places these days, and I hate it: how I fixed it (EDIT: this fix seems to massively speed up the browser too) was by adding a dead file

  1. physically create the file it wants\ where it wants, as a blank file (EG: "popper.min.js.map")

  2. put this in the blank file

    {
     "version": 1,
     "mappings": "",
     "sources": [],
     "names": [],
     "file": "popper.min.js"
    }
    
  3. make sure that "file": "*******" in the content of the blank file MATCHES the name of your file ******.map (minus the word ".map")

(EDIT: I suspect you could physically add this dead file method to the addon yourself)