Examine source code of Moodle Rubric2Feedback

{
  "manifest_version": 3,
  "name": "Moodle Rubric2Feedback",
  "version": "1.0",
  "description": "Inserts aggregated feedback into Moodle feedback editors based on rubric selections.",
  "permissions": [
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*/mod/assign/view.php?id=*"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end",
      "type": "module"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "moodlerubric2feedback@example.com"
    }
  }
}