Examine source code of Keyword Planner Plus

{
  "name": "Keyword Planner",
  "description": "Keyword Planner expands the number of search suggestions shown in the Google™, YouTube™, Amazon™, eBay™, and Etsy™ search bars.",
  "manifest_version": 2,
  "version": "0.0.25",
  "background": {
    "scripts": [
      "background/sw.js"
    ]
  },
  "content_scripts": [
    {
      "js": [
        "/lib/jquery-3.6.0.min.js",
        "/lib/masonry.pkgd.min.js",
        "/lib/utils.js",
        "/lib/keywordsEverywhere.js",
        "/lib/search/Amazon.js",
        "/lib/search/Bing.js",
        "/lib/search/Ebay.js",
        "/lib/search/Etsy.js",
        "/lib/search/Google.js",
        "/lib/search/Youtube.js",
        "/lib/search/index.js",
        "/content/components/Keyword.js",
        "/content/Content.js",
        "/content/google/index.js",
        "/content/youtube/index.js",
        "/content/amazon/index.js",
        "/content/bing/index.js",
        "/content/etsy/index.js",
        "/content/ebay/index.js",
        "/content/index.js"
      ],
      "css": [
        "/content/youtube/index.css",
        "/content/amazon/index.css",
        "/content/etsy/index.css",
        "/content/ebay/index.css",
        "/content/content.css"
      ],
      "matches": [
        "https://*/*"
      ]
    }
  ],
  "browser_action": {},
  "options_page": "options/index.html",
  "permissions": [
    "storage",
    "tabs"
  ],
  "icons": {
    "16": "assets/icons/16.png",
    "32": "assets/icons/32.png",
    "48": "assets/icons/48.png",
    "128": "assets/icons/128.png",
    "512": "assets/icons/512.png"
  },
  "web_accessible_resources": [
    "assets/icons/32.png",
    "assets/loader.svg"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{df1acd93-c40e-45b5-8e2a-081cfe00a905}"
    }
  }
}