Shut Up Privacy Policy

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Thank you for taking a moment to review my privacy policy for Shut Up.

I highly value the trust you place in me and my work to protect your personal information. To that end, I've worked hard to only collect info I need for Shut Up to work the way it does, and protect any info I do need to collect.

In this document, I endeavor to describe what info Shut Up collects in plain English, be clear about why I need to collect it, and – if applicable – the choices you have in limiting what data is collected.

Access to Page Content

On Chrome, Firefox, and Safari1, Shut Up uses JavaScript to decide whether or not to block comments as soon as you load a page. JavaScript is a general-purpose programming language, so these browsers don't know up-front what content Shut Up accesses on the pages you visit. This is why they declare that Shut Up can access all info on every page you visit.

When deciding whether to block comments, Shut Up reads the URLs of the pages you visit and compares them to an internal whitelist. It also injects a small amount of JavaScript into the page to handle hiding and showing comments. That's it.

On iOS, the Content Blocker API Shut Up uses is rule-based. That means Safari on iOS reads the rules that Shut Up provides, and blocks comments on Shut Up's behalf. So on iOS, Shut Up doesn't know anything about the websites you access.

On all versions of Shut Up, no browsing activity or page content is recorded or shared with anyone.


By default, Shut Up blocks comments on all websites. It shows comments, as an exception to this rule, through the use of a whitelist.

  • Chrome, Firefox and Safari: When you show comments on a website, Shut Up remembers that website in the whitelist. Hiding the comments again removes the website from the whitelist. It doesn't do this at all in the respective private browsing modes of these browsers.
  • iOS: The app shows the whitelist when you open it. You can manually change the whitelist to control which websites you want to see comments on.

On all versions of Shut Up, the whitelist is encrypted, and never leaves your device.

In Chrome, Firefox and Safari, you can stop Shut Up from adding sites to the whitelist by unchecking the "Remember where I've enabled comments" checkbox in the extension's settings.

Stylesheet Update

NOTE: Per AMO policy, the Firefox version of Shut Up doesn't include this update feature, so this section doesn't apply to Firefox.

Shut Up includes an open-source stylesheet called shutup.css. This is the very core of the extension – the secret to how it's able to block comments so well and so universally. Because webpages can change at any time, Shut Up has an update feature which keeps this stylesheet fresh.

Shut Up periodically checks for stylesheet updates from

  • Chrome: This update check happens every 48 hours at most, depending on whether your browser is running.
  • Safari: This update check happens whenever you relaunch Safari.
  • iOS: This update check uses iOS's Background Refresh API. It happens every 24 hours at most, depending on when iOS's heuristics allow it to run.

When Shut Up checks for updates, records the following identifying info in its server logs:

  • Your device's external IP address
  • Chrome and Safari: The version of Chrome or Safari you're running
  • iOS: The version of Shut Up you're running

This info is recorded for diagnostic purposes and is never shared or sold. It's automatically deleted after one week.


The degree to which third-party analytics are used and what data they collect depends on which browser you use with Shut Up.

  • Chrome: At this time, the Chrome Web Store doesn't appear to have a dedicated privacy policy. However, Google shares basic anonymized statistics with me, such as:

    • Number of active users, installations, and uninstallations
    • Which versions of Shut Up are in use
    • Users' language setting of Chrome or the OS
    • How many users have Shut Up enabled

    Please refer to Google's Privacy & Terms document for general info.

  • Firefox: Please refer to the Add-ons section of the Firefox Privacy Notice for info on what analytics are collected.
  • Safari: No analytics are used.
  • iOS: Please refer to this Apple Support article for info on what analytics are collected.

In all cases, these analytics are anonymized, and are only viewed and used by me to understand general demographics of who uses Shut Up. I don't share or sell this info.

You can opt-out of some or all forms of this data collection by referring to these third-parties' privacy policies and following any instructions provided.


On iOS, when you open Shut Up, it will scan your clipboard for any URLs you may wish to add to the whitelist. This check is completely automated and is done without accessing the Internet.

The clipboard data isn't stored without your explicit consent, and is only used for the whitelist feature.


If you have questions or concerns about anything in this document, please email me.

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1 Unless noted otherwise, I'm using "Safari" in this document to refer to the macOS version of Safari, and "iOS" to refer to the Shut Up app itself or the iOS version of Safari interchangeably.