diff --git a/res/css/views/auth/_AuthFooter.scss b/res/css/views/auth/_AuthFooter.scss
index 741be49a69..ab169a6898 100644
--- a/res/css/views/auth/_AuthFooter.scss
+++ b/res/css/views/auth/_AuthFooter.scss
@@ -19,7 +19,8 @@ limitations under the License.
     width: 100%;
     font-size: 14px;
     opacity: 0.72;
-    margin: 20px 0;
+    padding: 20px 0;
+    background: linear-gradient(rgba(0, 0, 0, 0), rgba(0, 0, 0, 0.8));
 }
 
 .mx_AuthFooter a:link,
diff --git a/res/css/views/auth/_AuthPage.scss b/res/css/views/auth/_AuthPage.scss
index 64b69c750f..8ef48b6265 100644
--- a/res/css/views/auth/_AuthPage.scss
+++ b/res/css/views/auth/_AuthPage.scss
@@ -26,8 +26,6 @@ limitations under the License.
     display: flex;
     margin: 100px auto auto;
     border-radius: 4px;
-    // Not currently supported in Firefox: https://bugzilla.mozilla.org/show_bug.cgi?id=1178765
-    backdrop-filter: blur(10px);
     box-shadow: 0 2px 4px 0 rgba(0, 0, 0, 0.33);
     background-color: $authpage-modal-bg-color;
 }