Examine source code of Skip

{
  "manifest_version": 3,
  "name": "Skip",
  "version": "0.1.0",
  "description": "Press CTRL + Right Arrow to skip ahead 85 seconds in any video.",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "type": "module"
  },
  "commands": {
    "skip": {
      "suggested_key": {
        "default": "Ctrl+Right"
      },
      "description": "Skip 85 Seconds"
    }
  },
  "permissions": [
    "scripting",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "skip@85"
    }
  }
}