Examine source code of Simple Bookmark Saver

{
  "manifest_version": 2,
  "name": "Simple Bookmark Saver",
  "version": "1.0",
  "description": "Quickly save and access your bookmarks.",
  "icons": {
    "48": "icons/bookmark-saver-icon-48.png"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icons/bookmark-saver-icon-48.png",
    "default_popup": "bookmark-popup.html",
    "default_title": "Simple Bookmark Saver"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9919acc1-1298-484e-a556-2ef6d43cadd5}"
    }
  }
}