Examine source code of ChroPath

{
  "manifest_version": 2,
  "name": "ChroPath",
  "description": "ChroPath helps to generate and validate selectors like relative xpath, cssSelector etc with iframe support.",
  "version": "5.1.5",
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "extension/popup.html"
  },
  "background": {
    "scripts": [
      "extension/background.js"
    ]
  },
  "content_security_policy": "script-src 'self'; object-src 'self';",
  "permissions": [
    "<all_urls>"
  ],
  "devtools_page": "devtools/devtools-page.html",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "content-script/contentScript.css"
      ],
      "js": [
        "content-script/contentScript.js"
      ]
    }
  ]
}