NVDA not honoring aria-selected="true" in date picker calendar

[grahamarmfield]

Steps to reproduce:

1. Start NVDA
2. Open Firefox
3. Navigate to W3C WAI Date Picker Dialog page (https://www.w3.org/WAI/ARIA/apg/patterns/dialog-modal/examples/datepicker-dialog/)
4. In the example, note that no date is currently in the text box. Open calendar by actioning 'Choose Date' button after text input field.
5. Use up, down, left and right arrow keys to move around the current month.
6. When on one date press Enter key to select that date. Date input field is populated with selected date.
7. Return to 'Choose Date' button after text input field and open calendar again.
8. Move around month using arrow keys - including moving to previously selected date.

Actual behavior:

1. When calendar is first opened NVDA announces current month table and current day number and not selected. For example "April 2024 table, 26 not selected". This is as expected.
2. When I move around in month NVDA announces new day number and not selected. For example "25 not selected, 24 not selected".
3. When I press Enter to select a date, NVDA announces "button Change Date, Wednesday April 24, 2024"
4. When I then open the calendar again and move around month using arrow keys NVDA once again announces day number and not selected.
5. When I move to the date I previously selected NVDA announces the day number and not selected.

Expected behavior:

If I have previously selected a date and I go back into the calendar, when I move onto the date I have previously selected I would expect NVDA to announce day number and 'selected' rather than 'not selected'.

Looking at the underlying code for the calendar the table cell containing the previously selected day number has aria-selected="true" present.

NVDA logs, crash dumps and other attachments:

nvda.log

System configuration

NVDA installed/portable/running from source:

NVDA is installed

NVDA version:

2024.1 (2024.1.0.31547)

Windows version:

Windows 10 Version 10.0.19045 Build 19045

Name and version of other software in use when reproducing the issue:

Firefox 125.0.2 (64-bit)

Other information about your system:

Other questions

Does the issue still occur after restarting your computer?

Yes

Have you tried any other versions of NVDA? If so, please report their behaviors.

No

If NVDA add-ons are disabled, is your problem still occurring?

Don't think I have add-ons running

Does the issue still occur after you run the COM Registration Fixing Tool in NVDA's tools menu?

Yes

[Adriani90]

Cc: @jcsteh

[jcsteh]

Coincidentally, i just filed a Firefox bug about this a few days ago. https://bugzilla.mozilla.org/show_bug.cgi?id=1893096

[jcsteh]

This has been fixed in Firefox Nightly and will be included in the Firefox 127 release.

[grahamarmfield]

Excellent, thanks for letting me know.