Examine source code of Netmirror Extension

{
  "manifest_version": 2,
  "name": "Netmirror Extension",
  "version": "3.20.5",
  "Version notes": "",
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "images/icon_16.png",
    "48": "images/icon_48.png",
    "128": "images/icon_128.png"
  },
  "browser_action": {
    "default_icon": "images/icon_48.png",
    "default_title": "Netmirror Extension",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "addon@browseraddon.shop",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}