Examine source code of List Finder

{
  "browser_action": {
    "browser_style": true,
    "default_title": "List Finder",
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon48dp.png"
    }
  },
  "background": {
    "scripts": [
      "backgroundScript.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ]
    }
  ],
  "description": "Finds all lists on page and gives them a pink border. ",
  "homepage_url": "https://github.com/sinc0115/list-finder",
  "icons": {
    "48": "icons/icon48dp.png"
  },
  "manifest_version": 2,
  "name": "List Finder",
  "permissions": [
    "<all_urls>",
    "notifications",
    "storage",
    "activeTab"
  ],
  "version": "1.1",
  "author": "Katherine Sinclair"
}