Examine source code of Amasin

{
  "manifest_version": 2,
  "name": "Amasin",
  "version": "0.0.2resigned1",
  "description": "Amazon ASIN helper",
  "permissions": [
    "contextMenus",
    "clipboardWrite",
    "activeTab"
  ],
  "icons": {
    "48": "icons/amasin_icon_48.png"
  },
  "background": {
    "scripts": [
      "amasin_background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{b8e257cf-81a4-4636-bfc0-4f11294ce01d}"
    }
  }
}