diff --git a/files/assets/css/chat.css b/files/assets/css/chat.css
index 8fed4ebcd..662bd335e 100644
--- a/files/assets/css/chat.css
+++ b/files/assets/css/chat.css
@@ -21,7 +21,6 @@
 }
 
 #chat-window {
-	-ms-overflow-style: none;
 	scrollbar-width: none;
 }
 
@@ -151,7 +150,6 @@ img[alt^="![]("], .img {
 }
 
 * {
-	-ms-overflow-style: none;
 	scrollbar-width: none;
 }
 
diff --git a/files/assets/css/main.css b/files/assets/css/main.css
index 0cdc20526..3f6bf698c 100644
--- a/files/assets/css/main.css
+++ b/files/assets/css/main.css
@@ -699,10 +699,6 @@ pre code {
 	border: 1px solid var(--gray-400);
 	border-radius: 0.35rem;
 }
-.form-control::-ms-expand {
-	background-color: transparent;
-	border: 0;
-}
 .form-control:-moz-focusring {
 	color: transparent;
 	text-shadow: 0 0 0 #495057;
@@ -722,10 +718,6 @@ pre code {
 	background-color: #e9ecef;
 	opacity: 1;
 }
-select.form-control:focus::-ms-value {
-	color: #495057;
-	background-color: #fff;
-}
 .form-control-sm {
 	height: calc(1.5em + 0.5rem + 2px);
 	padding: 0.25rem 0.5rem;
@@ -3780,21 +3772,9 @@ label.color-radio span {
 .form-inline.search .form-control::placeholder {
 	color: var(--black);
 }
-.form-inline.search .form-control::-ms-input-placeholder {
-	color: var(--black);
-}
-.form-inline.search .form-control::-ms-input-placeholder {
-	color: var(--black);
-}
 .form-inline.search .form-control:active::placeholder, .form-inline.search .form-control:focus::placeholder {
 	color: var(--black);
 }
-.form-inline.search .form-control:active::-ms-input-placeholder, .form-inline.search .form-control:focus::-ms-input-placeholder {
-	color: var(--black);
-}
-.form-inline.search .form-control:active::-ms-input-placeholder, .form-inline.search .form-control:focus::-ms-input-placeholder {
-	color: var(--black);
-}
 .form-control {
 	color: var(--muted);
 	border-color: var(--muted);
@@ -3821,12 +3801,6 @@ label.color-radio span {
 .form-control::placeholder {
 	color: var(--black);
 }
-.form-control::-ms-input-placeholder {
-	color: var(--black);
-}
-.form-control::-ms-input-placeholder {
-	color: var(--black);
-}
 label {
 	font-weight: 600;
 	font-size: 12px;
@@ -7384,7 +7358,6 @@ button, .btn {
 }
 
 .order-first {
-	-ms-flex-order: -1;
 	order: -1;
 }
 
@@ -7563,7 +7536,6 @@ ul {
 }
 
 .hide-scrollbar {
-	-ms-overflow-style: none;
 	scrollbar-width: none;
 }
 .hide-scrollbar::-webkit-scrollbar {