Doesn't really work. I have a Siteimprove account as a web developer at my workplace (a university) and none of the pages I browse to with it are giving any info from Siteimprove. They all say "No DCI score to show This page is not part of your Siteimprove subscription." The Google Chrome accessibility checker works well, but needs to be ported to Firefox!

Need an account and when came to siteimprove.com/en/pricing/ see a form in an iframe … How they can give advice on accessibility …

I'm not sure why the Firefox version of the extension needs an account and logon, which means you have to request their demo, when the Chrome version just works without jumping through hoops. Really? I need a demo for FireFox to show me how to click the extension button because Chrome users are so smart they don't need to go through the demo... So... that is straight up discrimination towards FireFox users. Ironic.

Although it knows my SiteImprove account, the error "The page is not part of your Siteimprove subscription." shows up on the very site that is part of my subscription.
If I can get around this issue I'll be able to give this extension a proper review.

Also, would be great to get the Accessibility Checker on Chrome in Firefox as that is my primary browser.