Firefox bug height

[vlad00777]

Bug in Firefox. (In jsfiddle this bug in Chrome too, but in my page chrome work fine)
I write:
$('.populb > div').equalHeight();
$('.populb .botfix').responsiveEqualHeightGrid(3);
$('.populb .topfix').responsiveEqualHeightGrid(3);

Plugin not write right heigth in firefox for block .populb .botfix;
In Chrome, Safsri that's ok!

This is link for jsfiddle:
http://jsfiddle.net/2rsvL8yj/

If you look that in firefox, you see this bug. Don't resize window for look this bug.
Please fix it! Thx.
Sorry for my Eng.

[vlad00777]

I find problem.
if my class ".populb > div .topfix" has style: display: table-row; Script lagging.