Examine source code of Pouch - Tab organizer

{
  "manifest_version": 2,
  "name": "Pouch",
  "version": "1.0",
  "description": "clean up browser window and save tabs for later",
  "permissions": [
    "bookmarks",
    "tabs",
    "storage",
    "menus"
  ],
  "browser_action": {
    "default_icon": "icons/newchest32.png",
    "default_title": "Pouch",
    "default_popup": "popup/choose_pocket.html",
    "browser_style": true
  }
}