Cassette Tape Effect

Privacy Policy

Japanese / 日本語

1. Overview

Cassette Tape Effect is a Chrome extension that applies cassette tape-style audio effects (wow, flutter, tone, and noise) to YouTube playback in real time. This policy describes how the extension handles your data.

Cassette Tape Effect does not collect, transmit, or share any personal information.

2. Information We Collect

Cassette Tape Effect does not collect any personal information. The extension does not use analytics, tracking, cookies, or any form of user identification.

3. Data Stored in Your Browser

Cassette Tape Effect stores the following data locally in your browser using the Chrome Storage API. This data never leaves your device.

  • chrome.storage.local — Your effect settings (fxState), which include: enabled, wow, flutter, tone, and noise. These values persist across browser sessions so your preferences are retained.
  • chrome.storage.session — Per-tab media detection state (media_<tabId>), indicating whether a media element is present on the current YouTube page. This data is automatically deleted when you close the tab, navigate to a different page, or close the browser.

4. Data Transmission

Cassette Tape Effect does not transmit any data to external servers. All processing is performed locally within your browser. There are no network requests, no third-party services, and no data sharing of any kind.

5. Permissions

Cassette Tape Effect requests the following browser permissions, each used solely for the purposes described below:

  • storage — Used to save and restore your effect settings (wow, flutter, tone, noise, and enabled state) across browser sessions.
  • activeTab — Used to detect the currently active tab and determine whether a media element is present on the page.
  • scripting — Used to inject the content script that applies audio effects to media elements on YouTube pages.
  • Host permission: *://*.youtube.com/* — Used to run the content script on YouTube pages, enabling the extension to access and process audio from video playback.

6. Changes to This Policy

If this privacy policy is updated, the revised version will be published at this URL. The effective date at the bottom of this page will be updated accordingly. Continued use of the extension after any changes constitutes acceptance of the updated policy.

7. Contact

If you have any questions or concerns about this privacy policy or the extension, please open an issue on our GitHub repository:

https://github.com/yuske-nakajima/cassette-fx/issues

8. Effective Date

This privacy policy is effective as of July 22, 2026.