Examine source code of TekPass

{
  "manifest_version": 2,
  "name": "TekPass",
  "version": "1.6",
  "default_locale": "zh_TW",
  "icons": {
    "48": "/res/tekpass-keep.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "scripting",
    "activeTab",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "/res/tekpass-keep.png",
    "default_title": "FireFox Extension",
    "default_popup": "cmorekey_fx.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "aa@bb.cc"
    }
  }
}