Examine source code of Link Control

{
  "action": {
    "default_icon": {
      "16": "./favicons/favicon-16x16.png",
      "32": "./favicons/favicon-32x32.png",
      "48": "./favicons/favicon-48x48.ico",
      "128": "./favicons/favicon-128x128.png"
    },
    "default_popup": "src/popup/index.html",
    "default_title": "Link Control"
  },
  "background": {
    "scripts": [
      "src/background/index.js"
    ],
    "type": "module"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "linkcontrol@innermonkdesign.com"
    }
  },
  "description": "Link Control - Adjust the color of your previously viewed links.",
  "host_permissions": [
    "*://*/*"
  ],
  "icons": {
    "16": "./favicons/favicon-16x16.png",
    "32": "./favicons/favicon-32x32.png",
    "48": "./favicons/favicon-48x48.ico",
    "128": "./favicons/favicon-128x128.png"
  },
  "manifest_version": 3,
  "name": "Link Control",
  "permissions": [
    "activeTab",
    "scripting",
    "storage",
    "tabs"
  ],
  "version": "2.0.4"
}