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Re: Accessible modal dialog plugin

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From: Bryan Garaventa
Date: Jan 11, 2017 11:24AM

I've reached out to the FF engineering folks and will report back any findings. I do have confirmation that the way aria-hidden is processed in FF has recently changed within the last couple point releases of Firefox so this may be having an impact on screen reader accessibility.

This from Marco:

"Hi Bryan, it has changed slightly, in that we now put the accessibles hidden by aria-hidden into a separate sub tree so they are no longer part of the main document, but are still available in case the hidden sub tree contains any focusables. There were no changes between Firefox 50.0 and 50.0.1, I believe the big change for aria-hidden happened in 49 or 48.
But Alex knows for sure."

Bryan Garaventa
Accessibility Fellow
SSB BART Group, Inc.
<EMAIL REMOVED>
415.624.2709 (o)
www.SSBBartGroup.com