Examine source code of Privacy Reading Mode

{
  "manifest_version": 2,
  "name": "Privacy Reading Mode",
  "version": "1.0",
  "description": "Tắt tracking khi đọc bài viết dài.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "tabs"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2521b5b6-e76e-4387-a869-e9f98646017d}"
    }
  }
}