Examine source code of Word Counter

{
  "version": "0.1.5",
  "manifest_version": 3,
  "name": "Word Counter",
  "homepage_url": "https://mybrowseraddon.com/word-counter.html",
  "description": "A lite tool for counting words and characters via right-click menu.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting",
    "contextMenus"
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "109.0",
      "id": "{91164e40-3de8-4619-a381-3cc95b083c5b}"
    }
  },
  "background": {
    "scripts": [
      "lib/config.js",
      "lib/chrome.js",
      "lib/runtime.js",
      "lib/common.js"
    ]
  },
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png"
  }
}