Examine source code of DN.se Enhancer

{
  "manifest_version": 2,
  "name": "DN.se Enhancer",
  "version": "1.1resigned1",
  "description": "Enhances the viewing experience on DN.se",
  "icons": {
    "48": "icons/48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.dn.se/*"
      ],
      "js": [
        "enhance.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b758306-9be0-410d-85cf-6bf6e157da3a}"
    }
  }
}