Examine source code of Webpage Color Adjuster

{
  "manifest_version": 3,
  "name": "Webpage Color Adjuster",
  "version": "1.1",
  "description": "Adjust Brightness, Contrast, Saturation, Hue, and Warmth of webpages.",
  "permissions": [
    "storage",
    "scripting",
    "tabs"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "action": {
    "default_title": "Adjust Page Colors",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content/apply_filters.js"
      ],
      "css": [
        "content/style.css"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "content/style.css"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "webpage-color-adjuster@yourdomain.com",
      "strict_min_version": "109.0"
    }
  }
}