Examine source code of fairad

{
  "manifest_version": 2,
  "name": "fairad",
  "version": "1.2resigned1",
  "description": "Removes sponsored content and paid posts from 20min.ch",
  "icons": {
    "48": "icons/icon-01.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.20min.ch/*",
        "*://*.watson.ch/*",
        "*://*.blick.ch/*"
      ],
      "js": [
        "assets/js/jquery-3.2.1.min.js",
        "assets/js/fairad.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a04e98b4-81ee-411c-a2ed-83cfcfd907c5}"
    }
  }
}