Examine source code of TabOut for LeetCode

{
  "manifest_version": 3,
  "name": "TabOut for LeetCode",
  "version": "0.2.0",
  "description": "Tab out of brackets, quotes, etc in LeetCode's code editor",
  "permissions": [
    "storage",
    "scripting",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "tabout@prxnav.dev",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "16": "assets/icons/icon-16.png",
    "48": "assets/icons/icon-48.png",
    "128": "assets/icons/icon-128.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "TabOut for LeetCode"
  },
  "host_permissions": [
    "https://leetcode.cn/*",
    "https://*.leetcode.cn/*",
    "https://leetcode.com/*",
    "https://*.leetcode.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://leetcode.cn/problems/*",
        "https://leetcode.cn/contest/*",
        "https://leetcode.cn/playground/*",
        "https://leetcode.com/problems/*",
        "https://leetcode.com/contest/*",
        "https://leetcode.com/playground/*",
        "https://*.leetcode.cn/problems/*",
        "https://*.leetcode.cn/contest/*",
        "https://*.leetcode.cn/playground/*",
        "https://*.leetcode.com/problems/*",
        "https://*.leetcode.com/contest/*",
        "https://*.leetcode.com/playground/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "web_accessible_resources": [
    {
      "resources": [
        "page-script.js"
      ],
      "matches": [
        "https://leetcode.cn/*",
        "https://*.leetcode.cn/*",
        "https://leetcode.com/*",
        "https://*.leetcode.com/*"
      ]
    }
  ]
}