Accessibility Review


At Mozilla, accessibility is a fundamental part of our mission to ensure the internet is “open and accessible to all,” helping to empower people, regardless of their abilities, to contribute to the common good. Accessibility Review is a service provided by the Mozilla Accessibility team to review features and changes to ensure they are accessible to and inclusive of people with disabilities.

Do I Need Accessibility Review?

You should consider requesting accessibility review if you aren’t certain whether your change is accessible to people with disabilities. Accessibility review is optional, but it is strongly encouraged if you are introducing new user interface or are significantly redesigning existing user interface.

When Should I Request Accessibility Review?

Generally, it’s best to request accessibility review as early as possible, even during the product requirements or UI design stage. Particularly for more complex user interfaces, accessibility is much easier when incorporated into the design, rather than attempting to retro-fit accessibility after the implementation is well underway.

The accessibility team has developed the Mozilla Accessibility Release Guidelines which outline what is needed to make user interfaces accessible. To make accessibility review faster, you may wish to try to verify and implement these guidelines prior to requesting accessibility review.

The deadline for accessibility review requests is Friday of the first week of nightly builds for the release in which the feature/change is expected to ship. This is the same date as the PI Request deadline.

How Do I Request Accessibility Review?

You request accessibility review by setting the a11y-review flag to “requested” on a bug in Bugzilla and filling in the template that appears in the comment field. For features spanning several bugs, you may wish to file a new, dedicated bug for the accessibility review. Otherwise, particularly for smaller changes, you may do this on an existing bug. Note that if you file a new bug, you will need to submit the bug and then edit it to set the flag.


If you have any questions, please don’t hesitate to contact the Accessibility team:

  • #accessibility on Matrix or Slack

  • Email: