Examine source code of Specsources - SpecGrab

{
  "name": "Specsources - SpecGrab",
  "version": "1.5.4",
  "description": "Create Specification Sheets and Catalog Items from any manufacturer's website.",
  "manifest_version": 3,
  "author": "SpecSources, Inc.",
  "icons": {
    "16": "icon.png",
    "32": "icon.png",
    "48": "icon.png",
    "128": "icon.png"
  },
  "host_permissions": [
    "https://*.specsources.com/*"
  ],
  "background": {
    "scripts": [
      "service-worker.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentScript.js"
      ],
      "run_at": "document_end"
    }
  ],
  "sidebar_action": {
    "default_panel": "index.html",
    "default_icon": "icon.png",
    "open_at_install": false,
    "default_title": "Specsources - SpecGrab"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "SpecGrab_0_0_9@specsources.com",
      "strict_min_version": "91.0"
    }
  }
}