Examine source code of Abbreviation Decoder

{
  "manifest_version": 2,
  "name": "Abbreviation Decoder",
  "browser_specific_settings": {
    "gecko": {
      "id": "{eceda9be-10db-4b9c-81b8-aea6532ed277}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "version": "1.0.0",
  "description": "Bulk import abbreviations via CSV and see definitions on hover.",
  "permissions": [
    "storage",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  }
}