Examine source code of WallaTab

{
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "description": "__MSG_extDescription__",
  "icons": {
    "128": "img/icon.png"
  },
  "manifest_version": 2,
  "name": "__MSG_extName__",
  "short_name": "__MSG_extShortName__",
  "default_locale": "en",
  "version": "4.0.1",
  "permissions": [
    "storage",
    "unlimitedStorage"
  ],
  "options_ui": {
    "page": "settings.html",
    "open_in_tab": false
  }
}