Examine source code of Fiverr Quick View

{
  "manifest_version": 2,
  "name": "Fiverr Quick View",
  "version": "1.4.2",
  "description": "Fiverr Quick View - It allows you to sort search results, extract keywords, and view important metrics like favorites and ratings.",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.fiverr.com/*",
        "http://www.fiverr.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "storage"
  ],
  "web_accessible_resources": [
    "flags/*.png"
  ],
  "browser_action": {
    "default_icon": {
      "16": "images/icon-16.png",
      "32": "images/icon-32.png",
      "48": "images/icon-48.png",
      "128": "images/icon-128.png"
    },
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{33c75b1a-93f7-4555-b943-660362116d2b}"
    }
  }
}