Examine source code of Crunchyroll Faster

{
  "name": "Crunchyroll Faster",
  "version": "2.1",
  "description": "Want to watch your anime faster? Here's a playback speed chrome extension for crunchyroll!",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "crunchyroll-speeder@sasukelric.com",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "128": "icon.svg"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.crunchyroll.com/*"
      ],
      "run_at": "document_end",
      "all_frames": true,
      "js": [
        "playback.js"
      ]
    }
  ],
  "permissions": [
    "activeTab",
    "scripting",
    "storage"
  ],
  "host_permissions": [
    "https://*.crunchyroll.com/*"
  ]
}