Examine source code of tabzen

{
  "manifest_version": 2,
  "name": "tabzen",
  "version": "1.2.11resigned1",
  "description": "Too many open tabs? Manage your tabs, regain your sanity and improve your browsing experience with tabzen",
  "homepage_url": "http://tabzen.org",
  "applications": {
    "gecko": {
      "id": "tabzen@tabzen.org"
    }
  },
  "icons": {
    "48": "images/logo.png",
    "96": "images/logo96.png"
  },
  "background": {
    "scripts": [
      "js/common.js",
      "js/background.js"
    ]
  },
  "browser_action": {
    "browser_style": true,
    "default_title": "TabZen",
    "default_popup": "html/popup-menu.html",
    "default_icon": "images/logo.svg"
  },
  "sidebar_action": {
    "default_icon": "images/logo.svg",
    "default_title": "TabZen",
    "default_panel": "html/sidebar.html",
    "open_at_install": true
  },
  "omnibox": {
    "keyword": "tz"
  },
  "commands": {
    "showSavedTabs": {
      "suggested_key": {
        "default": "Alt+Shift+T"
      },
      "description": "Show save tabs"
    },
    "saveCurrentTab": {
      "suggested_key": {
        "default": "Alt+T"
      },
      "description": "Save current tab"
    },
    "saveCurrentWindow": {
      "suggested_key": {
        "default": "Alt+A"
      },
      "description": "Save current window"
    },
    "saveAllWindows": {
      "suggested_key": {
        "default": "Alt+Shift+A"
      },
      "description": "Save all windows"
    }
  },
  "permissions": [
    "storage",
    "tabs"
  ],
  "optional_permissions": [
    "downloads"
  ]
}