Examine source code of Microphone Privacy Guard

{
  "manifest_version": 2,
  "name": "Microphone Privacy Guard",
  "version": "1.0",
  "description": "Cảnh báo khi có trang web sử dụng microphone.",
  "permissions": [
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{85ce5e3d-c817-4bf6-aa97-82519c477ad9}"
    }
  }
}