Examine source code of watdat

{
  "manifest_version": 2,
  "name": "Wat dat",
  "version": "1.1",
  "description": "Highlight any text on the web page and press Ctrl+Shift+X to see an explaination by AI.",
  "homepage_url": "https://github.com/bhavyagada/watdat",
  "icons": {
    "48": "icons/what-48.png",
    "96": "icons/what-96.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_icon": "icons/what-48.png",
    "default_title": "Watdat",
    "default_popup": "popup/what.html"
  },
  "commands": {
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+X"
      },
      "description": "Open Wat dat extension"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{af5788c0-adb3-4a2d-b7ab-be032d53ba2f}"
    }
  }
}