Examine source code of Scribe

{
  "manifest_version": 2,
  "name": "Scribe",
  "version": "1.3",
  "description": "Scribe helps users generate step-by-step documentation with screenshots, and export as JSON, Markdown, or PDF.",
  "icons": {
    "32": "icons/logo_32.png",
    "64": "icons/logo_64.png",
    "128": "icons/logo_128.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "downloads"
  ],
  "browser_action": {
    "default_icon": "icons/logo_64.png",
    "default_title": "Scribe - Capture Steps",
    "default_popup": "popup.html"
  },
  "options_page": "options.html",
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3a1bc264-a47a-4f3d-8183-c9169a68672c}"
    }
  }
}