Examine source code of Fertilizer

{
  "manifest_version": 3,
  "name": "Fertilizer",
  "description": "Web extension to enhance Harvest UI",
  "version": "1.1.0",
  "browser_specific_settings": {
    "gecko": {
      "id": "{e7c40e74-3a6b-4c67-9e26-1c2f2435f9ad}"
    }
  },
  "action": {
    "default_title": "Fertilizer",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.harvestapp.com/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}