Examine source code of Reddit Restore Blocked Comments

{
  "manifest_version": 2,
  "name": "Reddit - Restore Blocked User Comments",
  "version": "1.4",
  "description": "Restores comment text and usernames hidden due to block relationships, using the Arctic Shift archive. Requests are made to arctic-shift.photon-reddit.com to retrieve archived comment content.",
  "icons": {
    "48": "icons/icon48.png",
    "96": "icons/icon96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "reddit-restore-blocked-comments@st0uty",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  },
  "permissions": [
    "https://old.reddit.com/*",
    "https://arctic-shift.photon-reddit.com/*",
    "https://preview.redd.it/*",
    "https://i.redd.it/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://old.reddit.com/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ]
}