Is Siteimprove Accessibility Checker safe?

Clean risk

Checks web pages in Firefox for accessibility issues and provides recommendations based on ACT rules.

This extension runs automated accessibility testing on the current web page and shows an immediate overview of detected issues. It provides explanations of how issues affect visitors and offers recommendations with links to relevant WCAG techniques. It can evaluate password-protected, non-public, dynamic pages, and multi-step forms within the browser.

SiteimproveFirefox Add-ons
0Risk
Who publishes it

Siteimprove - no other listings under this identity, 5 shared hostnames

What this publisher told the store about itself, and the other listings that told it the same thing.

Shared hosts - 5 hostnames

Hostnames hardcoded in this extension that few other listings call. That can mean one operator behind both, and it can equally mean a small shared vendor, so it is context rather than a conclusion. Hosts that many listings call are left out: they are services, not connections.

alfa.siteimprove.com
Also called by 2 other listings, including Siteimprove Accessibility Checker
example.photos
Also called by 2 other listings, including Siteimprove Accessibility Checker
act-rules.github.io
Also called by 3 other listings, including Siteimprove Accessibility Checker
help.siteimprove.com
Also called by 4 other listings, including Siteimprove Accessibility Checker, ARC Toolkit
siteimprove.com
Also called by 5 other listings

AI-generated. Findings may contain errors. Those marked Verified have been manually reviewed.

Publishers can request a review.

Where it sends data

Destinations our analysis observed Siteimprove Accessibility Checker contacting. Sending data somewhere is not a finding on its own - an extension that syncs your settings has to talk to its own server - but it is where your data can go, and who else it goes to.

  • hello.siteimprove.com

    Siteimprove Accessibility Checker sends data to hello.siteimprove.com. No other extension we have analysed sends data here.

Updated 15 October 2026amo-2700010