Expanded/collapsed state fails to read

[tspivey]

STR:

1. Open Firefox and browse to http://heydonworks.com/practical_aria_examples/#progressive-collapsibles
2. In browse mode, press enter on First title in block of content

I should hear expanded, but I hear nothing. Same for collapsed.

[jcsteh]

Firefox is regenerating the accessible for that button when it expands/collapses. So, instead of firing a stateChange, it fires focus on a "new" accessible. See Mozilla bugs 659886 and 1285862.

If it were a stateChange, NVDA would report it. Instead, NVDA suppresses reporting the focus event because it's at the same position in the document (and not doing this would result in a lot of duplication when moving around).

[jcsteh]

Actually, this is a duplicate of #5247 as far as NVDA is concerned (even if the CSS which triggers this behaviour is different).