Examine source code of TruePath

{
  "manifest_version": 2,
  "name": "TruePath",
  "description": "TruePath generates the relative XPath on click",
  "version": "1.0.4",
  "icons": {
    "48": "xpath.png"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "match_about_blank": true,
      "matches": [
        "http://*/*",
        "https://*/*",
        "<all_urls>"
      ],
      "js": [
        "content-script/content.js",
        "dialog.js"
      ]
    }
  ],
  "browser_action": {
    "browser_style": true,
    "default_icon": "xpath.png",
    "default_title": "TruePath",
    "default_popup": "popup/TruePath.html"
  },
  "background": {
    "scripts": [
      "extension/background1.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "clipboardWrite",
    "activeTab",
    "tabs",
    "storage"
  ],
  "author": "Sumit Ghosh",
  "homepage_url": "https://qaworld.ga/truepath",
  "browser_specific_settings": {
    "gecko": {
      "id": "{19e2de85-50e0-4287-bd5a-46dc997b230e}"
    }
  }
}