login: Fix rendering in Firefox

scp/css/login.css

@@ -31,7 +31,6 @@ body {
     margin: 0;
     text-align: center;
     background-image: url(../images/oscar-wall.jpg);
-    background-repeat: repeat-x;
     background-attachment: fixed;
     background-color:orange;
     background-blend-mode: multiply;
@@ -51,7 +50,7 @@ body {
     background-color: rgba(255, 165, 0, 0.7);
 }
 #background {
-    position: fixed;
+    position: absolute;
     top: 0;
     left: 0;
     right: 0;
@@ -63,6 +62,7 @@ body {
          -o-background-size: cover;
             background-size: cover;
     background-blend-mode: multiply;
+    background-attachment: fixed;
     background-color: orange;
     mix-blend-mode: normal;
     filter:"progid:DXImageTransform.Microsoft.Blur(PixelRadius='6')";
@@ -76,7 +76,7 @@ body {
     right: 0;
     bottom: 0;
     -webkit-filter: blur(2px);
-    filter: url("data:image/svg+xml;utf9,<svg%20version='1.1'%20xmlns='http://www.w3.org/2000/svg'><filter%20id='blur'><feGaussianBlur%20stdDeviation='6'%20/></filter></svg>#blur");
+    filter: url("data:image/svg+xml;utf9,<svg%20version='1.1'%20xmlns='http://www.w3.org/2000/svg'><filter%20id='blur'><feGaussianBlur%20stdDeviation='2'%20/></filter></svg>#blur");
     filter: blur(2px);
     overflow: hidden;
     z-index: -1;
@@ -88,7 +88,7 @@ body, input {
 }
 
 #loginBox {
-    border:1px solid rgba(0,0,0,0.2);
+    border:1px solid rgba(0,0,0,0.3);
     box-shadow:0 0 30px 5px orange, 0 0 5px -1px black;
     mix-blend-mode: normal;
     isolation: isolate;
@@ -127,18 +127,19 @@ body, input {
 
 .tape {
     background-image: url(../images/tape.png);
-    -webkit-background-size: cover;
-       -moz-background-size: cover;
-         -o-background-size: cover;
-            background-size: cover;
+    -webkit-background-size: 100% 100%;
+       -moz-background-size: 100% 100%;
+         -o-background-size: 100% 100%;
+            background-size: 100% 100%;
     position: absolute;
     top: -22px;
     left: 105px;
     width: 180px;
     height: 35px;
-    transform: rotate(-5deg);
+    transform: rotate(-3deg);
     -webkit-transform: rotate(-3deg);
     -webkit-filter: drop-shadow(rgba(0,0,0,0.2) 0px -1px 1px);
+    filter: drop-shadow(rgba(0,0,0,0.2) 0px -1px 1px);
 }
 
 h1 {