Examine source code of LeetSessionManager

{
  "manifest_version": 2,
  "name": "LeetSessionManager",
  "description": "Manage leetcode sessions easily",
  "homepage_url": "https://github.com/pawanjenu/LeetcodeSessionManager",
  "version": "2.0.6",
  "author": "Pawan Jenu",
  "browser_action": {
    "default_icon": "assets/thumbnail.png",
    "default_popup": "index.html"
  },
  "icons": {
    "16": "assets/thumbnail.png",
    "48": "assets/thumbnail.png",
    "128": "assets/thumbnail.png"
  },
  "background": {
    "scripts": [
      "background.js",
      "runtime.js"
    ],
    "persistent": true
  },
  "permissions": [
    "https://leetcode.com/*",
    "unlimitedStorage",
    "storage",
    "webRequest",
    "webRequestBlocking"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{cfdceac7-9798-4a86-a4c6-0b9ec3c46bf1}"
    }
  }
}