Examine source code of 2FAuth (beta)

{
  "manifest_version": 2,
  "name": "2FAuth (beta)",
  "description": "Access your 2FAuth details and generate 2FA passwords directly from your browser toolbar",
  "version": "1.0.1",
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "64": "icon-64.png",
    "96": "icon-96.png",
    "128": "icon-128.png"
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "clipboardWrite",
    "alarms",
    "idle",
    "tabs"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "2FAuth",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7bd56395-5d0b-48d5-821e-4fbaeb467dfc}"
    }
  }
}