Examine source code of tabsuspender

{
  "manifest_version": 3,
  "name": "__MSG_appName__",
  "default_locale": "en",
  "version": "1.6",
  "browser_specific_settings": {
    "gecko": {
      "id": "tabsuspender@tabsuspender.app",
      "strict_min_version": "128.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "ExtPay.js",
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "alarms",
    "storage"
  ],
  "host_permissions": [
    "https://extensionpay.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "media-hook.js"
      ],
      "run_at": "document_start",
      "world": "MAIN"
    },
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "commands": {
    "suspend-active": {
      "suggested_key": {
        "default": "Ctrl+Shift+S",
        "mac": "Command+Shift+S"
      },
      "description": "Suspend the current tab"
    },
    "suspend-all": {
      "description": "Suspend all inactive tabs"
    }
  }
}