1369629 - [e10s] F10 keydown preventDefault

Status: RESOLVED DUPLICATE of bug 1292053

(Core :: DOM: Events, defect)

Description

[bugzilla77]

Attachment: F10_keydown_preventDefault.html

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.36

Steps to reproduce:

Press F10 when:

document.addEventListener('keydown',function(e){if(e.keyCode==121)e.preventDefault()},false)


Actual results:

The 'Menu Bar' appears.


Expected results:

The 'Menu Bar' should not appear.

Comment 1

[bugzilla77]

1. Use Firefox 53.0.3
2. Hide browser 'Menu Bar'
3. Open testcase
4. Press F10 key
5. The 'Menu Bar' should not appear because: document.addEventListener('keydown',function(e){if(e.keyCode==121)e.preventDefault()},false)

substantiation: web applications that use F10 lose input fields focus.

Firefox 49.0 - 53.0.3 (regression): F10 keydown preventDefault do not work
Firefox 48.0.2: OK
Chrome 58: OK (menu button not focused)
Opera 45: OK (menu button not focused)

Comment 2

[Loic]

It's only an issue with e10s (multiprocess) enabled. iIf you disable e10s in FF53, it works.
FF40 with e10s enabled has the bug too.

Comment 3

[Hsin-Yi Tsai (she/her) [:hsinyi]]

Sounds a dup. of bug 1292053. Please feel free to reopen if I misinterpret the issue.