Examine source code of Supportly

{
  "manifest_version": 2,
  "name": "Supportly",
  "description": "Auf Amazon einkaufen und Projekte unterstützen.",
  "version": "1.0.3resigned1",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "all_frames": true
    }
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html",
    "default_title": "Supportly"
  },
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "<all_urls>",
    "tabs"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{5367f3e2-9635-499d-b89a-940504ea3400}"
    }
  }
}