Examine source code of Copy Tab Title

{
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "description": "Context menu to copy tab title",
  "manifest_version": 2,
  "name": "Copy Tab Title",
  "permissions": [
    "clipboardWrite",
    "menus",
    "tabs"
  ],
  "version": "1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{5d056705-bd6a-4560-8be2-ccad4adea281}"
    }
  }
}