Examine source code of TiddlyMarker

{
  "manifest_version": 2,
  "name": "TiddlyMarker",
  "version": "0.3.2",
  "default_locale": "en",
  "description": "__MSG_extensionDescription__",
  "permissions": [
    "<all_urls>",
    "tabs",
    "webRequest",
    "storage",
    "alarms",
    "downloads"
  ],
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png"
  },
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_icon": {
      "19": "icons/19.png",
      "38": "icons/38.png"
    },
    "default_title": "__MSG_browserActionHover__",
    "default_popup": "popup.html",
    "browser_style": true
  },
  "applications": {
    "gecko": {
      "id": "tiddlymarker@ylh.io"
    }
  }
}