Firefox css spinner animation rendering issue - html

Question

A spinner I want to use on my site looks bad on Firefox (48.0.2).
Comparison between Firefox and Chrome (imgur)
See the spinner live (Third spinner)
Is there a fix for this rendering issue?
Slowing the animation down didn't help so I'm turning to you guys (:D) and I don't think there is a fix for this yet on stackoverflow.
Here is code demonstrating the problematic spinner:
body {
background: #0dc5c1;
}
.loader {
font-size: 10px;
margin: 50px auto;
text-indent: -9999em;
width: 11em;
height: 11em;
border-radius: 50%;
background: #ffffff;
background: -moz-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
background: -webkit-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
background: -o-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
background: -ms-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
background: linear-gradient(to right, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
position: relative;
-webkit-animation: load3 1.4s infinite linear;
animation: load3 1.4s infinite linear;
-webkit-transform: translateZ(0);
-ms-transform: translateZ(0);
transform: translateZ(0);
}
.loader:before {
width: 50%;
height: 50%;
background: #ffffff;
border-radius: 100% 0 0 0;
position: absolute;
top: 0;
left: 0;
content: '';
}
.loader:after {
background: #0dc5c1;
width: 75%;
height: 75%;
border-radius: 50%;
content: '';
margin: auto;
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
}
#-webkit-keyframes load3 {
0% {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
100% {
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
}
#keyframes load3 {
0% {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
100% {
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
}
<div class="loader">Loading...</div>
Tested on Firefox, Chrome, Edge and IE(11). Only Firefox has problems.

Answer 1

body {
background: #0dc5c1;
}
.loader {
font-size: 10px;
margin: 50px auto;
/*text-indent: -9999em;*/
width: 11em;
height: 11em;
border-radius: 50%;
background: #ffffff;
background: -moz-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
background: -webkit-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
background: -o-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
background: -ms-linear-gradient(left, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
background: linear-gradient(to right, #ffffff 10%, rgba(255, 255, 255, 0) 42%);
position: relative;
-webkit-animation: load 1.4s infinite linear;
animation: load 1.4s infinite linear;
/* -webkit-transform: translateZ(0);
-ms-transform: translateZ(0);
transform: translateZ(0);*/
}
.loader:before {
width: 50%;
height: 50%;
background: #ffffff;
border-radius: 100% 0 0 0;
position: absolute;
top: 0;
left: 0;
content: '';
}
.loader:after {
background: #0dc5c1;
width: 75%;
height: 75%;
border-radius: 50%;
content: '';
margin: auto;
position: absolute;
top: 0;
left: 0;
bottom: 0;
right: 0;
}
#-webkit-keyframes load {
0% {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
100% {
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
}
#keyframes load {
0% {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
100% {
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
}
<div class="loader"></div>