Examine source code of KickBack.no

{
  "manifest_version": 2,
  "name": "KickBack knappen",
  "version": "3.0.3resigned1",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "64": "icons/icon-64.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "css/injected.css"
      ],
      "js": [
        "js/injected.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "img/*"
  ],
  "browser_action": {
    "default_icon": "icons/icon-128.png",
    "default_title": "KickBack knappen",
    "default_popup": "panel.html"
  },
  "homepage_url": "https://kickback.no",
  "permissions": [
    "storage",
    "cookies",
    "tabs",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "Kickback@KickbackAS"
    }
  }
}