Examine source code of Better Color Picker

{
  "manifest_version": 3,
  "name": "Better Color Picker",
  "version": "1.0.2",
  "description": "Custom color picker for color inputs with advanced features",
  "icons": {
    "48": "icons/palette-48.png",
    "96": "icons/palette-96.png",
    "128": "icons/palette-128.png"
  },
  "permissions": [
    "storage",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "picker.css"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "better-color-picker@cugniere.org",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "author": "cugniere",
  "homepage_url": "https://github.com/cugniere/better-color-picker"
}