What's the title?

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "What's the title?",
  "short_name": "Title Attr",
  "version": "2019.2.1",
  "description": "Check if title attribute for links are the same as the link text and therefore redundant",
  "author": "Laurence Lewis",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "jquery-3.1.1.min.js",
        "content.js"
      ],
      "css": [
        "index.css"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "icons/title-attr-48.png",
    "default_title": "Whats the title?"
  },
  "icons": {
    "16": "icons/title-attr-16.png",
    "48": "icons/title-attr-48.png",
    "64": "icons/title-attr-64.png",
    "128": "icons/title-attr-128.png"
  },
  "permissions": [
    "https://*/*",
    "http://*/*",
    "activeTab"
  ]
}