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1. Introduction

Custom Themes for YouTube is a browser extension that lets you customize YouTube themes, colors, progress bars, and related viewer tools. You can install it from the Chrome Web Store. This Privacy Policy explains our practices regarding data collection, use, and protection when you use Custom Themes for YouTube or visit our website.

By using Custom Themes for YouTube or installing the extension, you agree to this policy. Questions? Contact us at [email protected].

2. Single Purpose

Custom Themes for YouTube has a single, narrow purpose - to customize the appearance and tools of YouTube in your browser.

The extension does not bundle unrelated features. All functionality serves this one goal.

3. Information We Collect

Custom Themes for YouTube does not collect any personal or sensitive user data through the browser extension.

3.1 Browser Extension Data

  • The extension does not collect, store, or transmit personal data, browsing history, website content, full URLs, page titles, IP addresses, or user identifiers.
  • All extension functionality is applied locally on your device.
  • Only user preferences (e.g. selected theme, colors, progress bar style, and enable/disable state) are stored locally using chrome.storage.local.
  • Settings persist after browser restart so you do not need to reconfigure them.
  • No data is transmitted to external servers.

3.2 Website Data

When visiting our website (outside of the extension), limited technical data such as IP address or browser type may be collected for basic website functionality. This data is not linked to the extension and is handled separately.

4. Extension Permissions

Custom Themes for YouTube requests only the permissions necessary for its core functionality and saving your settings locally. No data is sent to external servers.

4.1 Storage

This permission allows you to save user settings, such as selected themes, colors, progress bar styles, and enable/disable state. Your settings are saved locally so you do not have to reconfigure them after restarting the browser.

4.2 Host Permissions (YouTube)

Allows the extension to run on YouTube pages (youtube.com and youtu.be) so it can apply your chosen styles and tools.

4.3 Scripting

Allows the extension to apply visual customizations and tools on YouTube pages. This is necessary to change themes, colors, progress bars, or related UI elements.

5. Remote Code

Custom Themes for YouTube does not use remote code.

The extension does not fetch or execute JavaScript, logic, or configuration from remote servers. All extension code is packaged within the extension bundle.

6. How We Use Your Information

Custom Themes for YouTube does not use personal data for analytics, advertising, tracking, profiling, or monetization. The extension operates locally and does not transmit data externally.

Local settings are used solely for the extension's core functionality. Website data (if visiting cusmize.com separately) is handled under site policies and is not linked to the extension.

7. Data Storage and Security

Custom Themes for YouTube stores all data locally on your device. This data never leaves your device. Information collected through our website is stored with industry-standard security measures.

No user data is stored on our servers. No cloud storage is used by the extension.

8. Data Usage Certifications

In accordance with Chrome Web Store requirements, we certify the following regarding user data:

  • We do not sell or transfer user data to third parties, except as permitted in approved use cases (e.g., legal requirements).
  • We do not use or transfer user data for purposes unrelated to the operation or improvement of the extension's core functionality (customizing the YouTube viewing experience).
  • We do not use or transfer user data to determine creditworthiness or for lending purposes.

This extension complies with the Chrome Web Store Program Policies and Limited Use requirements.

9. Cookies and Tracking

Our website may use cookies. See our Cookie Policy. The extension does not use cookies for tracking.

10. Third-Party Services

No third-party analytics or advertising services are integrated into the Custom Themes for YouTube browser extension.

When you install from the Chrome Web Store, that platform may collect information according to its own privacy policies.

11. Data Sharing and Disclosure

Custom Themes for YouTube does not sell, share, rent, or disclose any user data. The extension does not transmit any data to third parties.

12. Your Privacy Rights

Depending on your location, you may have rights to access, correct, delete, or object to processing of your personal information. We do not sell personal information.

To exercise these rights, contact us at [email protected]. We will respond within 30 days.

13. Children's Privacy

Our services are not directed to children under 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided us with personal information, please contact us.

14. Changes to This Policy

We may update this Privacy Policy from time to time. The "Last updated" date will be revised. Continued use after changes constitutes acceptance.

Last updated: June 24, 2026

For questions, please contact us or see our Legal Information page.