When key-kill-mode is enabled, Conkeror will stop handling application keybindings such as "C-x b" etc.
Conkeror will appear to be locked up, with no error messages in the console. Scrolling with the mouse
will however still work. "conkeror -f unfocus" will display a message in the minibuffer but does not
solve the problem.

I have reproduced the problem on xulrunner versions 25, 26 and 29a1-2014-01-29, without RC files and with
a fresh profile.

Steps to reproduce:
1. Run "conkeror -q"
2. M-x require("key-kill")
3. M-x key-kill-mode
4. Conkeror will no longer respond to keypresses.
5. No errors in the console

My guess would be that they changed the way that keyboard events are processed, so that killing keydown
also automatically kills keypress.  It would be noted in a changelog or the "What changed" document if so.
An experiment that you could do would be to alter key-kill-mode so that it doesn't kill the keydown event,
and only kills the keyup event.  This would undermine its purpose, but it would at least tell you whether
this theory is correct.

Altering key-kill-mode to not kill the keydown event indeed results in Conkeror keybindings continuing to
work.

Got the same issue here but changing key-kill mode source does not fix the issue.
I am using xulrunner 27.0-1

kamaradclimber,

You might have misread. There is currently no fix. Editing the source was only an attempt to better
understand the problem.

If I am not mistaken, this problem is caused by the fix to this mozilla bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=501496

Essentially they stopped generating corresponding keypress events when a keydown event is killed.

so i think i may have a solution, but i really don't know what the hell i'm doing.

Any way i had a look over the kkk plugin for keysnail [1]. and they are just using the stopPropagation
method instead of both stopPropagation and preventDefault.

This seems to also work for the key-kill plugin, i have attached the patch i'm using to get key-kill
working again.  As i said though, i don't really know much javascript so i'm not sure if there will be
any side effects.

1. https://github.com/mooz/keysnail/blob/master/plugins/kkk.ks.js

Patch has no effect for me running latest Conkeror from the git repository with firefox -app (version 39).

key-kill-mode works fine on Pale Moon (25.8.1), which is based on FF 24.

The patch uploaded uploaded by russel works great here. It should got master.
Conkeror 1.0.0 -app with Firefox 45.0

russell: Thanks for the fix.

lompik: Thanks for testing it and bringing it to my attention.

The fix has been merged http://repo.or.cz/conkeror.git/commit/f87c22e196021fcd8028e62727bd94300eca5ba7