Examine source code of Slideshow Viewer

{
  "manifest_version": 2,
  "name": "Slideshow Viewer",
  "version": "1.0",
  "description": "View all images on the page as a fullscreen slideshow.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_title": "Start Slideshow",
    "default_icon": "icon.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{355932b6-4281-4a4f-9ba3-954b783f651d}"
    }
  }
}