Examine source code of Convert HTML to Haml

{
  "manifest_version": 2,
  "name": "Convert HTML to Haml",
  "version": "1.0.1",
  "description": "Convert HTML to Haml without needing a new tab.",
  "browser_specific_settings": {
    "gecko": {
      "id": "convert_html_to_haml@example.com"
    }
  },
  "icons": {
    "48": "icon.svg",
    "96": "icon.svg"
  },
  "permissions": [
    "storage",
    "menus",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}