Examine source code of ECRP Select Search

{
  "manifest_version": 3,
  "name": "ECRP Select Search",
  "version": "0.0.5",
  "browser_specific_settings": {
    "gecko": {
      "id": "ecrp_select_search@hazel.me",
      "strict_min_version": "109.0"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://gov.eclipse-rp.net/*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ]
}