Examine source code of Video Controls Plus: Speed Control for YouTube ...

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "description": "__MSG_extensionDescription__",
  "version": "14.4.0",
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "default_locale": "en",
  "author": "Ahsan Mahmood <aoneahsan@gmail.com> (https://aoneahsan.com)",
  "homepage_url": "https://vcpeai.aoneahsan.com",
  "permissions": [
    "storage",
    "activeTab",
    "contextMenus",
    "identity",
    "alarms",
    "notifications",
    "<all_urls>"
  ],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Alt+V"
      },
      "description": "Open Video Controls Plus"
    },
    "toggle_control_center": {
      "suggested_key": {
        "default": "Ctrl+Shift+V",
        "mac": "Command+Shift+V"
      },
      "description": "Toggle Control Center overlay"
    },
    "toggle_pip": {
      "suggested_key": {
        "default": "Ctrl+Shift+P",
        "mac": "Command+Shift+P"
      },
      "description": "Toggle Picture-in-Picture"
    },
    "take_screenshot": {
      "suggested_key": {
        "default": "Ctrl+Shift+C",
        "mac": "Command+Shift+C"
      },
      "description": "Take video screenshot"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Video Controls Plus",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "open_in_tab": true,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4f033bc6-08e7-4deb-8fb2-286dba2a943b}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "authenticationInfo",
          "locationInfo",
          "personallyIdentifyingInfo",
          "websiteActivity"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}