Revert "deprecate embedded browser (#12163)"

This reverts commit 736d8cbac4.

Bring contrib files for older contributions

browser/app/less/inc/base.less

@@ -0,0 +1,31 @@
+* {
+    -webkit-font-smoothing: antialiased;
+    -moz-osx-font-smoothing: grayscale;
+
+    &:focus,
+    &:active {
+        outline: 0;
+    }
+}
+
+html {
+    font-size: 10px;
+    -webkit-tap-highlight-color: rgba(0,0,0,0);
+}
+
+html,
+body {
+    min-height: 100%;
+}
+
+a {
+    .transition(color);
+    .transition-duration(300ms);
+
+}
+
+button {
+    border: 0;
+}
+
+