Examine source code of Panel Tint

{
  "manifest_version": 3,
  "name": "Panel Tint",
  "version": "1.0.0",
  "description": "Niezależny, konfigurowalny motyw kolorystyczny dla Sales Center. Działa lokalnie, bez analityki i wysyłania danych.",
  "permissions": [
    "storage"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "action": {
    "default_title": "Panel Tint – ustawienia motywu",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png"
    }
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://salescenter.allegro.com/*",
        "https://salescenter.allegro.pl/*"
      ],
      "css": [
        "content/theme.css"
      ],
      "js": [
        "shared/settings.js",
        "content/theme-controller.js"
      ],
      "run_at": "document_start",
      "all_frames": false
    },
    {
      "matches": [
        "https://salescenter.allegro.com/*",
        "https://salescenter.allegro.pl/*"
      ],
      "css": [
        "content/editor.css"
      ],
      "js": [
        "shared/settings.js",
        "content/editor-controller.js"
      ],
      "run_at": "document_end",
      "all_frames": true,
      "match_about_blank": true
    }
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'; object-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0f4e2618-7ff9-4000-a7eb-38a75fe91f08}",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}