Examine source code of Anime Faster – Playback Speed

{
  "name": "__MSG_extensionName__",
  "version": "3.1",
  "description": "__MSG_extensionDescription__",
  "default_locale": "en",
  "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.png"
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icon.png",
    "default_title": "__MSG_actionTitle__"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.crunchyroll.com/*",
        "https://*.animationdigitalnetwork.fr/*",
        "https://*.animationdigitalnetwork.com/*",
        "https://*.animedigitalnetwork.fr/*",
        "https://*.netflix.com/*",
        "https://*.disneyplus.com/*",
        "https://*.primevideo.com/*",
        "https://*.amazon.com/*",
        "https://*.amazon.fr/*",
        "https://*.amazon.de/*",
        "https://*.amazon.es/*",
        "https://*.amazon.it/*",
        "https://*.amazon.co.uk/*",
        "https://*.amazon.ca/*"
      ],
      "run_at": "document_end",
      "all_frames": true,
      "js": [
        "playback.js"
      ]
    }
  ],
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://*.crunchyroll.com/*",
    "https://*.animationdigitalnetwork.fr/*",
    "https://*.animationdigitalnetwork.com/*",
    "https://*.animedigitalnetwork.fr/*",
    "https://*.netflix.com/*",
    "https://*.disneyplus.com/*",
    "https://*.primevideo.com/*",
    "https://*.amazon.com/*",
    "https://*.amazon.fr/*",
    "https://*.amazon.de/*",
    "https://*.amazon.es/*",
    "https://*.amazon.it/*",
    "https://*.amazon.co.uk/*",
    "https://*.amazon.ca/*"
  ]
}