Examine source code of VRCFriendCheck

{
  "name": "VRCFriendCheck",
  "description": "__MSG_description__",
  "version": "1.5.2",
  "manifest_version": 2,
  "default_locale": "en",
  "icons": {
    "16": "icons/icon-16.png",
    "128": "icons/icon-128.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/icon-19.png",
      "38": "icons/icon-38.png"
    },
    "default_title": "VRCFriendCheck",
    "default_popup": "popup/popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options/options.html",
    "chrome_style": true
  },
  "permissions": [
    "https://api.vrchat.cloud/*",
    "alarms",
    "storage",
    "notifications"
  ]
}