Examine source code of Multi Input Paste

{
  "manifest_version": 2,
  "name": "Multi Input Paste",
  "version": "0.4.0",
  "description": "Allows pasting into multiple inputs at once",
  "icons": {
    "48": "icons/Paste.svg",
    "96": "icons/Paste.svg"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "tabs",
    "clipboardRead"
  ],
  "page_action": {
    "default_icon": "icons/Paste.svg",
    "browser_style": true,
    "default_title": "Multi Paste Values"
  }
}