Examine source code of Video Speed Control Pro

{
  "manifest_version": 3,
  "name": "Video Speed Control",
  "version": "1.3.0",
  "description": "Control HTML5 video playback speed from 0.5× to 4× on any website.",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "96": "icons/icon96.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png"
    },
    "default_popup": "popup/popup.html",
    "default_title": "Video Speed Control"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/content.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "commands": {
    "increase-speed": {
      "suggested_key": {
        "default": "Alt+Period"
      },
      "description": "Increase playback speed by 0.1×"
    },
    "decrease-speed": {
      "suggested_key": {
        "default": "Alt+Comma"
      },
      "description": "Decrease playback speed by 0.1×"
    },
    "reset-speed": {
      "suggested_key": {
        "default": "Alt+N"
      },
      "description": "Reset playback speed to 1×"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "video-speed-control@vsc.extension",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}