Examine source code of Slugifier

{
  "name": "Slugifier",
  "description": "Turns your selected text into-a-slug",
  "version": "1.0.1resigned1",
  "permissions": [
    "activeTab",
    "contextMenus",
    "clipboardWrite"
  ],
  "background": {
    "scripts": [
      "slugifier.js"
    ]
  },
  "icons": {
    "16": "icons/slugifier16.png",
    "48": "icons/slugifier48.png",
    "128": "icons/slugifier128.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{51a583e7-7a70-4f98-a014-6d3f4af415bd}"
    }
  }
}