Examine source code of CommenTime

{
  "name": "CommenTime",
  "version": "2.11.3",
  "description": "Turns YouTube comment timestamps into a clickable heatmap on the progress bar. Includes a live comment replay panel that syncs with the video.",
  "manifest_version": 3,
  "action": {
    "default_popup": "popup.html",
    "default_title": "CommenTime",
    "default_icon": "icon.png"
  },
  "icons": {
    "64": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "tabs",
    "scripting",
    "webNavigation"
  ],
  "optional_permissions": [
    "notifications"
  ],
  "host_permissions": [
    "https://www.youtube.com/*",
    "https://m.youtube.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*",
        "https://m.youtube.com/*"
      ],
      "js": [
        "content-script.js"
      ],
      "css": [
        "content.css"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "comment-worker.js"
      ],
      "matches": [
        "https://www.youtube.com/*",
        "https://m.youtube.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "CommenTime@byuserforuser.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}