Examine source code of Block Service Workers

{
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "{8e13fae2-8de2-4aee-a942-fc41c911f85e}",
      "strict_min_version": "52.0"
    }
  },
  "name": "Block Service Workers",
  "description": "Disallow to register Service Workers",
  "version": "0.3.7resigned1",
  "icons": {
    "16": "logox16.png",
    "48": "logox48.png",
    "128": "logo.png"
  },
  "permissions": [
    "tabs",
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "confirm.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "settings.html",
    "default_icon": "logox32.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*"
      ],
      "run_at": "document_start",
      "js": [
        "index.js"
      ],
      "all_frames": true
    }
  ]
}