Revert "deprecate embedded browser (#12163)"

This reverts commit 736d8cbac4.

Bring contrib files for older contributions

browser/karma.conf.js

@@ -0,0 +1,56 @@
+/*
+ * MinIO Object Storage (c) 2021 MinIO, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+var webpack = require('webpack');
+
+module.exports = function (config) {
+  config.set({
+    browsers: [ process.env.CONTINUOUS_INTEGRATION ? 'Firefox' : 'Chrome' ],
+    singleRun: true,
+    frameworks: [ 'mocha' ],
+    files: [
+      'tests.webpack.js'
+    ],
+    preprocessors: {
+      'tests.webpack.js': [ 'webpack' ]
+    },
+    reporters: [ 'dots' ],
+    webpack: {
+      module: {
+        loaders: [{
+          test: /\.js$/,
+          exclude: /(node_modules|bower_components)/,
+          loader: 'babel',
+          query: {
+            presets: ['react', 'es2015']
+          }
+        }, {
+          test: /\.less$/,
+          loader: 'style!css!less'
+        }, {
+          test: /\.css$/,
+          loader: 'style!css'
+        }, {
+          test: /\.(eot|woff|woff2|ttf|svg|png)/,
+          loader: 'url'
+        }]
+      }
+    },
+    webpackServer: {
+      noInfo: true
+    }
+  });
+};