Examine source code of Snake Search

{
  "manifest_version": 2,
  "name": "Snake Search",
  "version": "1.2",
  "description": "Addss a cute ssnake whenever your ssearch query hass too many 's's.",
  "icons": {
    "48": "snake-48x48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.duckduckgo.com/?*"
      ],
      "js": [
        "snake-search.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "snake.png"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{18b47ded-781c-4a2a-9b2f-41684b54d08d}"
    }
  }
}