Examine source code of StickyTab

{
  "manifest_version": 3,
  "name": "StickyTab",
  "version": "1.8.3",
  "description": "Sticky notes per URL. Notes persist per page. Icon turns yellow when a note exists.",
  "author": "MinoshW",
  "homepage_url": "https://stickytab.minosh.me/",
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{a3f7e2c1-5b84-4d92-9e6f-1c2d3e4f5a6b}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "browsingActivity"
        ]
      }
    }
  },
  "permissions": [
    "storage",
    "tabs",
    "alarms"
  ],
  "host_permissions": [
    "https://base.minosh.me/*",
    "https://api.gumroad.com/*"
  ],
  "action": {
    "default_popup": "popup/stickytab-popup.html",
    "default_icon": {
      "16": "icons/icon.svg",
      "32": "icons/icon.svg",
      "48": "icons/icon.svg",
      "96": "icons/icon.svg"
    },
    "default_title": "StickyTab"
  },
  "icons": {
    "16": "icons/icon.svg",
    "32": "icons/icon.svg",
    "48": "icons/icon.svg",
    "96": "icons/icon.svg"
  },
  "background": {
    "scripts": [
      "stickytab-background.js"
    ],
    "type": "module"
  }
}