Examine source code of Leetcode Hardmode

{
  "manifest_version": 3,
  "name": "Leetcode Hardmode",
  "description": "Hides giveaway information about a problem until you decide to reveal it. Leetcode wisely.",
  "version": "1.0.1",
  "content_scripts": [
    {
      "matches": [
        "https://leetcode.com/problems/*"
      ],
      "js": [
        "Content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "leetcodehardmode@whatdoiputhere.com",
      "strict_min_version": "109.0"
    }
  }
}