Examine source code of tab2hyperlink

{
  "manifest_version": 2,
  "name": "tab2hyperlinklist",
  "version": "1.1",
  "description": "Prepares a list of hyperlink list from open tabs and put them into clipboard.",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/icon-19.png",
      "38": "icons/icon-38.png"
    },
    "default_title": "pack my list"
  },
  "permissions": [
    "<all_urls>",
    "clipboardWrite",
    "tabs"
  ],
  "background": {
    "scripts": [
      "tab2hyperlinklist.js"
    ]
  }
}