Rotating cells quirk on Firefox

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    <h1>Minesweeper</h1>
    
    <table class="minefield-board unselectable">
      <tbody id="minefield"><tr class="row-0"><td class="col-0"></td><td class="col-1 hidden-cell"></td><td class="col-2 hidden-cell"></td><td class="col-3 hidden-cell"></td><td class="col-4 hidden-cell"></td><td class="col-5 hidden-cell"></td><td class="col-6 hidden-cell"></td><td class="col-7 hidden-cell"></td><td class="col-8 hidden-cell"></td><td class="col-9 hidden-cell"></td><td class="col-10 hidden-cell"></td><td class="col-11 hidden-cell"></td><td class="col-12 hidden-cell"></td><td class="col-13 hidden-cell"></td><td class="col-14 hidden-cell"></td><td class="col-15 hidden-cell"></td><td class="col-16 hidden-cell"></td><td class="col-17 hidden-cell"></td><td class="col-18 hidden-cell"></td><td class="col-19 hidden-cell"></td><td class="col-20 hidden-cell"></td><td class="col-21 hidden-cell"></td><td class="col-22 hidden-cell"></td><td class="col-23 hidden-cell"></td><td class="col-24 hidden-cell"></td><td class="col-25 hidden-cell"></td><td class="col-26 hidden-cell"></td><td 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                toggleBlockCell($(this));
        }
    });


	var toggleBlockCell = function(cell) {
		cell
			.removeClass("hidden-cell")
			.toggleClass("blocked-cell");
	};
	
  
}($("#minefield")));

/* Styles go here */

* {
  background-color: white;
}

/* Uncomment this to fix
.minefield-board {
    border: 5px solid transparent;
    position: relative;
    left: -5px;
}
*/

.unselectable {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

td {
	border: 1px solid black;
	width: 18px;
	height: 20px;
	text-align: center;
	border-radius: 3px;
	background-color: gray;
    cursor: default;
}

.hidden-cell:hover {
	background-color: lightgray;
}

.revealed-cell {
	background-color: white;
}

.bomb-cell {
	background-color: red;
}

.blocked-cell {
    background-color: green;
    -webkit-animation: rotating 0.5s alternate 0s 1 ease-in-out;
    -moz-animation: rotating 0.5s alternate 0s 1 ease-in-out;
    -o-animation: rotating 0.5s alternate 0s 1 ease-in-out;
    animation: rotating 0.5s alternate 0s 1 ease-in-out;
}

@-webkit-keyframes rotating {
    0% { 
        -webkit-transform: rotate(0deg);
    } 100% { 
        -webkit-transform: rotate(90deg);
    }
}

@-moz-keyframes pressing {
    from { 
        transform: rotate(0deg);
    } to { 
        transform: rotate(90deg);
    }
}

@keyframes rotating {
    from { 
        transform: rotate(0deg);
    } to { 
        transform: rotate(90deg);
    }
}

.highlight-cell {
    opacity: 0.9;
}

.alarm-cell {
    color: red;
    font-weight: bold;
}

.minefield-board tbody{
	background-color: lightgray;
}

#control-panel {
	margin-top: 5px;
}

button {
	background-color: lightgray;
}

button:hover {
	background-color: gray;
}

.display {
	margin-top: 5px;
}

.display-text{
	background-color: lightgray;
}