Examine source code of FitCopy

{
  "manifest_version": 2,
  "name": "FitCopy",
  "description": "Copy selected text and convert it for fitnesse wiki code",
  "version": "1.1resigned1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "clipboardWrite"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8bb8a880-c2b3-4e9a-879b-e761f8b40291}"
    }
  }
}