Extract People also search phrases in Google

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Extract People also search phrases in Google",
  "short_name": "People also search for SEO",
  "description": "Shows and adds all phrases from \"People also search for\" to the textarea in top right corner - so you can simply harvest them all.",
  "icons": {
    "16": "/images/icon16.png",
    "24": "/images/icon24.png",
    "32": "images/icon32.png",
    "64": "images/icon64.png",
    "128": "images/icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "images/icon16.png",
      "24": "images/icon24.png",
      "32": "images/icon32.png",
      "128": "images/icon128.png"
    },
    "default_popup": "html/popup.html"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": true
  },
  "version": "1.31",
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "*://*/*"
      ],
      "include_globs": [
        "*://www.google.*/*q=*",
        "*://encrypted.google.*/*q=*"
      ],
      "exclude_matches": [
        "*://*/*tbm=lcl*"
      ],
      "js": [
        "js/jquery-3.2.1.min.js",
        "js/content.js"
      ],
      "css": [
        "css/css.css"
      ],
      "all_frames": true
    }
  ]
}