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.",
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_title": "View Slideshow"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{64756a4c-5010-4699-87db-04cdfee37cad}"
    }
  }
}