This seems like a regression because we used to access activity windows with the screen reader. The core issue here is that activity window is rendered inside an app window container that is marked inactive and thus has aria-hidden attribute set to "true". Steps to reproduced were reported by Julien in https://bugzilla.mozilla.org/show_bug.cgi?id=1211115#c12 1. Open the Messages app 2. Activate the "new message" button. 3. Activate the "+" button. => Then I couldn't select a contact. The whole activity window is not visible to the screen reader.

Caused by changes made in Bug 1144132 B2g Inbound Regression Window Last Working Environmental Variables: Device: Flame 2.5 BuildID: 20150622170244 Gaia: c4d3b8fd78bcd7eff1b127060ec6490a891b7a35 Gecko: 2ab4034b2cc1 Version: 41.0a1 (2.5) Firmware Version: v18D User Agent: Mozilla/5.0 (Mobile; rv:41.0) Gecko/41.0 Firefox/41.0 First Broken Environmental Variables: Device: Flame 2.5 BuildID: 20150623190325 Gaia: eb0d4aefa62b20420d6fa0642515a110daca5d97 Gecko: 5a3ee6baf143 Version: 41.0a1 (2.5) Firmware Version: v18D User Agent: Mozilla/5.0 (Mobile; rv:41.0) Gecko/41.0 Firefox/41.0 Last Working gaia / First Broken gecko - This issue does NOT occur with broken Gecko Gaia: c4d3b8fd78bcd7eff1b127060ec6490a891b7a35 Gecko: 5a3ee6baf143 Last Working gecko / First Broken gaia - This issue DOES occur with broken Gaia Gecko: 2ab4034b2cc1 Gaia: eb0d4aefa62b20420d6fa0642515a110daca5d97 B2G Inbound Pushlog: https://github.com/mozilla-b2g/gaia/compare/c4d3b8fd78bcd7eff1b127060ec6490a891b7a35...eb0d4aefa62b20420d6fa0642515a110daca5d97

Gabriele you handled another issue caused by Bug 1144132. Can you weigh in here as well?

This is most likely due to the window management changes which I'm not very familiar with. I only handled the gecko part of bug 1144132 so I'm NI'ing Etienne who certainly knows more.

(In reply to Gabriele Svelto [:gsvelto] from comment #3) > This is most likely due to the window management changes Yep.

Comment on attachment 8680609 [details] [gaia] etiennesegonzac:bug-1218897 > mozilla-b2g:master LGTM, thanks!