Examine source code of Copy URL + Title

{
  "name": "Copy URL + Title",
  "version": "1.0",
  "manifest_version": 2,
  "description": "Lets you copy URL, Title, Title + URL of All Open Tabs or Current tabs in Text or HTML format using the right click menu.",
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "48": "img/icon48.png",
    "128": "img/icon128.png"
  },
  "background": {
    "page": "background.html"
  },
  "permissions": [
    "contextMenus",
    "unlimitedStorage",
    "tabs",
    "http://*/*",
    "https://*/*",
    "clipboardRead",
    "clipboardWrite"
  ]
}