Examine source code of URL Collector

{
  "manifest_version": 2,
  "name": "URL Collector",
  "version": "2.0",
  "description": "Collect and manage URLs and form data.",
  "permissions": [
    "activeTab"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png",
      "48": "icon.png",
      "128": "icon.png"
    }
  },
  "icons": {
    "48": "icon.png"
  },
  "host_permissions": [
    "https://*/*",
    "http://*/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon.png",
      "48": "icon.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a20dc93f-4ce9-4888-be64-b7a542ce0bcb}"
    }
  }
}