Retrieve images from database not shown in firefox.

<?php
Header("Content-type: image/jpeg");
$var = @$_GET['q'] ;
$trimmed = trim($var);
$con = mysql_connect("localhost","sample","sample");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("sample", $con);
$sql = mysql_query("SELECT * FROM links");

while($row = mysql_fetch_array($sql))
{
echo $row['title'];
echo "<center><img height='200' width='200' src='".$row['image']."'></img><br><br><br></center>";
//echo "<img src='".$row['imgdata']."'>";
echo $row['link'];
echo "<br />";
}
mysql_close($con);
?>

its work correctly on IE but in fire fox it shows the path of the PHP file...!

Output in firefox = http://localhost/mywork/asad_black/view_records.php