Examine source code of Astral Codex Eleven

{
  "manifest_version": 3,
  "name": "Astral Codex Eleven",
  "version": "0.2.6",
  "description": "Speeds up loading of comments on Astral Codex Ten (https://www.astralcodexten.com/).",
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    "48": "images/icon-48x48.png",
    "128": "images/icon-128x128.png"
  },
  "permissions": [
    "declarativeNetRequestWithHostAccess"
  ],
  "host_permissions": [
    "*://www.astralcodexten.com/p/*"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset-1",
        "enabled": true,
        "path": "filter-rules.json"
      }
    ]
  },
  "web_accessible_resources": [
    {
      "matches": [
        "*://www.astralcodexten.com/*"
      ],
      "resources": [
        "filtered-comments.json",
        "main-script.js"
      ]
    }
  ],
  "content_scripts": [
    {
      "matches": [
        "*://www.astralcodexten.com/*"
      ],
      "exclude_matches": [
        "*://www.astralcodexten.com/p/*/comment/*",
        "*://www.astralcodexten.com/p/*/comments"
      ],
      "css": [
        "ext-comments.css"
      ],
      "js": [
        "ext-comments.js",
        "astral-codex-eleven.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "astral-codex-eleven@verver.ch"
    }
  }
}