Examine source code of Bookmarks by Date

{
  "name": "Bookmarks by Date",
  "version": "1.0.5resigned1",
  "manifest_version": 2,
  "description": "Displays a list of bookmarks in descending order from newest to oldest, grouped by the day they were added.",
  "icons": {
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": "icon48.png",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "bookmarks",
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{bd9fc6c0-a54c-4011-bd29-fdd4fff642a7}"
    }
  }
}