Examine source code of linguAid

{
  "name": "linguAid",
  "version": "2.1resigned1",
  "manifest_version": 2,
  "description": "Add-on that provides an aid for understanding the meanings of unknown technical terms.",
  "background": {
    "scripts": [
      "linguAid.js"
    ]
  },
  "permissions": [
    "contextMenus",
    "<all_urls>"
  ],
  "icons": {
    "48": "icons/cloud-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{18789934-0f8c-487d-bad7-efcb1f345968}"
    }
  }
}