Examine source code of SMMRY-XT

{
  "name": "SMMRY-XT",
  "version": "1.0.4",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "contextMenus",
    "scripting",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "48": "./img/s-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6a00f71e-bd54-443d-b36a-c9133d5f1d2d}"
    }
  }
}