Examine source code of ClipDee

{
  "manifest_version": 2,
  "name": "ClipDee",
  "version": "1.0.0",
  "description": "Instantly see the meaning of any word you copy",
  "permissions": [
    "clipboardRead",
    "storage",
    "https://api.dictionaryapi.dev/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "ClipDee - Word Definitions",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9f746bc8-7aa6-4ca2-bb4e-7602df78eddf}"
    }
  }
}