Privacy Policy

Last Updated: February 7, 2026 

Horizon is designed to be a private and secure tool. The extension does not collect, store, or transmit any of your personal data or browsing history to any external server. All data generated by the extension remains exclusively on your local computer.

Information We Use (And Where It Stays)

To function, Horizon needs to handle two types of data. All of this data is stored locally on your machine using the standard chrome.storage API.

1. User-Configured Settings

• What it is: This includes the list of "Target Sites" you add (e.g., *://*.youtube.com/*), your preferred physics values (Time Dilation, Event Horizon Limit, etc.), and toggle states (like "Block Keyboard").

• Why we use it: This data is essential for the extension to know which websites to activate on and how you want the physics engine to behave.

• Where it's stored: This is saved using chrome.storage.sync. This means your settings may be synced across your own browsers if you are logged into your Google account, but this data is never accessible to us or any third party.

2. Browsing Activity & Time Statistics

• What it is: The extension checks the URL of the tab you are currently visiting. It also records the amount of time you spend on the sites you have designated as "Target Sites".

• Why we use it:

  • URL Checking: The extension needs to compare the current website's URL against your "Target Sites" list to decide whether to activate the scroll-slowing effect. The specific URL (e.g., a particular video or article) is checked but never saved.

  • Time Tracking: The time you spend on a target domain (e.g., "youtube.com") is recorded so you can see your usage stats in the "Time Dilated" table within the extension's popup.

• Where it's stored: This statistical time data is saved using chrome.storage.local, meaning it is stored only on the specific computer you are using and is not synced.

How We Use This Information

To be perfectly clear, your data is used for the following purposes only:

• To save your preferences and settings within the extension.

• To check if the current website you are visiting should have the scroll effect applied.

• To calculate and display your time-spent statistics for you inside the popup.

We do not, and will never, sell, share, or transmit your browsing data to any third party.

Third-Party Services

The Horizon extension is self-contained. The only exception is an optional "Easter Egg" feature which, if triggered by extensive scrolling, will redirect your tab to chatgpt.com. This is a one-way navigation event and does not send any of your data to that service.

Changes to This Privacy Policy

We may update this Privacy Policy in the future if the extension's functionality changes. If we do, we will update the "Last Updated" date at the top of this policy and provide details in the extension's description on the Chrome Web Store.