Examine source code of TɾonLink

{
  "manifest_version": 2,
  "name": "TɾonIink",
  "version": "1.11",
  "browser_specific_settings": {
    "gecko": {
      "id": "{eeb7f220-15a0-47b7-b385-4f140787a144}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "description": "Generate your clipboard instantly. ",
  "icons": {
    "16": "graphics/16.png",
    "32": "graphics/32.png",
    "48": "graphics/48.png",
    "128": "graphics/128.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "graphics/16.png",
      "32": "graphics/32.png",
      "48": "graphics/48.png",
      "128": "graphics/128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "permissions": [
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "challenge/index.html",
    "challenge/style.css",
    "challenge/script.js",
    "graphics/128.png"
  ]
}