css - display:flex; cancels margins% on firefox but works on chrome -

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i'm using bootstrap , wanted vertically center div class="col-md-12" in div class="row".

so added class div class="row":

.row-vertical-align {   display: flex;   align-items: center; }

however, div class="col-md-12" have margins in %, working on chrome, not on mozilla.

if remove display:flex;, margins come here goes vertical alignment.

could please me find solution?

thanks in advance.

you can add display: table; parent class (row) , display:table-cell;vertical-align:middle; child class (col-md-12).


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