Examine source code of Crates.io Search

{
  "manifest_version": 2,
  "name": "Crates.io Search",
  "version": "1.0",
  "description": "Adds a search engine which searches crates.io for Rust crates",
  "applications": {
    "gecko": {
      "strict_min_version": "65.0"
    }
  },
  "chrome_settings_overrides": {
    "search_provider": {
      "name": "crates.io",
      "search_url": "https://crates.io/search?q={searchTerms}",
      "keyword": "crate",
      "favicon_url": "https://crates.io/favicon.ico",
      "is_default": false,
      "encoding": "UTF-8"
    }
  }
}