Examine source code of Stutter Scroll

{
  "manifest_version": 2,
  "name": "Stutter Scroll",
  "version": "1.0.3resigned1",
  "homepage_url": "https://github.com/richardbrockie/stutter_scroll",
  "description": "Use a set of webpages as digital signage. \n\nReading scrolling text is difficult - Stutter Scroll pauses as it scrolls through a set of webpages. Pauses occur at instances of a specified css class - these tags should each have a unique #id selector assigned. Stutter Scroll scrolls to each #id in turn.\n\nMore info at GitHub.",
  "applications": {
    "gecko": {
      "id": "stutter_scroll@ontheday.net"
    }
  },
  "developer": {
    "name": "Richard Brockie / OnTheDay.net"
  },
  "icons": {
    "48": "icons/stutter_scroll.svg",
    "96": "icons/stutter_scroll.svg"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icons/stutter_scroll.svg",
    "default_title": "Start Stutter Scroll"
  },
  "background": {
    "scripts": [
      "stutter_scroll.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "content_scripts/messages.js"
      ]
    }
  ]
}