tabindex bugs in Firefox

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tabindex bugs in Firefox

Jon Gibbins (dotjay)-2
Hi all,

I've been poking around with tabindex after investigating a keyboard
navigation bug in Firefox with jQuery UI's accordion plugin. I wrote
some test cases and found four (probably related) tabindex bugs:

http://lab.dotjay.co.uk/tests/tabindex-firefox/

1. A normally focusable immediate child of an element with tabindex="0"
is skipped over when tabbing forwards through the page (test 13 best
demonstrates this).

2. The parent element with tabindex="0" traps keyboard navigation when
tabbing backwards through the page (test 13 best demonstrates this).

3. A normally focusable immediate child of an element with tabindex="-1"
is skipped over when tabbing forwards through the page after receiving
focus from a link activated with the Enter key (test 4 best demonstrates
this).

4. The object element does not have an implied tabindex of "0" (test 14
best demonstrates this). However, it is arguable that there is no need
to tab to an object element.

A quick look through bugzilla suggests that the last observation is
related to this bug report:
https://bugzilla.mozilla.org/show_bug.cgi?id=88140

But it doesn't look like the other bugs have been logged. I thought I'd
post here to see if Mozilla know of these bugs. Shall I log them in
bugzilla anyway?

Jon

http://dotjay.co.uk/
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