Examine source code of Coursera Quiz Printer

{
  "description": "Unlocks printing of practice quizzes, real quizzes, and exams on Coursera.org",
  "manifest_version": 2,
  "name": "Coursera Quiz Printer",
  "short_name": "Coursera Quizprint",
  "version": "1.2",
  "icons": {
    "48": "icon48.png",
    "96": "icon96.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.coursera.org/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "hook.js"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{6be0021d-b4bf-4cfe-bef1-db9499a6ffa2}"
    }
  }
}