Published by Celexly · Last updated: July 23, 2026
Sentinel, a Celexly product, does its work entirely on your device. It has no analytics, no telemetry, and no tracking of you. Your browsing history, the list of sites you visit, and the log of what Sentinel blocked never leave your device. The only time Sentinel contacts a server is to check whether you have a valid Pro purchase. This policy applies to the Sentinel browser extension for Chrome, Edge, and Firefox.
Everything below is kept in your browser's local extension storage on your own device. None of it is uploaded to us.
| Data | Why |
|---|---|
| Your settings and toggles | To remember how you want Sentinel to behave. |
| Your allow-list and block-list | To honor the sites you have chosen to trust or block. |
| The interception log | To show you what was blocked. It stays on your device and you can clear it at any time. |
| Filter lists you import | If you import a list (for example EasyList), its text is stored locally so the rules can be applied. Sentinel never downloads a list for you. |
| Per-site and schedule preferences | To apply the right protection per site and time. |
Your browser may sync a small amount of this settings data across your own signed-in browsers using the browser's own encrypted sync. That is your browser's feature, under your browser account, not a Sentinel server.
Sentinel needs permission to run on the pages you visit so it can detect and stop pop-ups, forced redirects, overlays, and fake dialogs. That processing happens locally, in the moment, and is not recorded or transmitted.
Sentinel Pro is optional. Free protection is complete and never expires. If you choose to buy Pro:
extensionpay.com with an anonymous
license key and receives back whether the purchase is active. ExtPay associates your purchase
with the email you provide at checkout.Sentinel uses no advertising networks, no analytics providers, and no third-party trackers. The only third parties involved at all are ExtPay and Stripe, and only when you make a purchase.
Sentinel is a general-audience utility and is not directed at children under 13. It does not knowingly collect information from children.
If this policy changes, the "Last updated" date above will change and the new version will be posted at this URL.
All purchases are final. Sentinel does not offer refunds, including for the current billing period and any past periods. Because the free tier lets you fully evaluate how Sentinel works before paying, we ask you to try the free version first and purchase Pro only when you are sure it is right for you.
The Monthly and Yearly plans are subscriptions. You can cancel at any time:
The Lifetime plan is a single one-time payment. It is not a subscription, there is nothing to cancel, and it is non-refundable. It grants Pro for as long as the product is available.
If you were charged in error (for example, a duplicate charge or a technical fault), contact us and we will look into it. This does not change the no-refund policy for ordinary purchases.
Nothing in this policy removes any refund or cancellation right you have under the consumer law that applies where you live, and where such a right applies it overrides this policy.
Questions about privacy, refunds, or your purchase, contact us at celexlytech@gmail.com.
We aim to reply within a few business days.