diff --git a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KotlinKarma.kt b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KotlinKarma.kt
index db8d5b4a9df..8d63c5a1bc1 100644
--- a/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KotlinKarma.kt
+++ b/libraries/tools/kotlin-gradle-plugin/src/main/kotlin/org/jetbrains/kotlin/gradle/targets/js/testing/karma/KotlinKarma.kt
@@ -257,6 +257,22 @@ class KotlinKarma(override val compilation: KotlinJsCompilation) : KotlinJsTestF
     ): TCServiceMessagesTestExecutionSpec {
         if (debug) {
             config.singleRun = false
+
+            confJsWriters.add {
+                //language=ES6
+                it.appendln(
+                    """
+                        if (!config.plugins) {
+                            config.plugins = config.plugins || [];
+                            config.plugins.push('karma-*'); // default
+                        }
+                        
+                        config.plugins.push('kotlin-test-js-runner/karma-debug-framework.js');
+                    """.trimIndent()
+                )
+            }
+
+            config.frameworks.add("karma-kotlin-debug")
         }
 
         if (config.browsers.isEmpty()) {
diff --git a/libraries/tools/kotlin-test-js-runner/build.gradle.kts b/libraries/tools/kotlin-test-js-runner/build.gradle.kts
index 9dbbb75b5c1..61d6f9bab8f 100644
--- a/libraries/tools/kotlin-test-js-runner/build.gradle.kts
+++ b/libraries/tools/kotlin-test-js-runner/build.gradle.kts
@@ -54,6 +54,7 @@ tasks {
             "karma.ts",
             "karma-kotlin-reporter.js",
             "karma-debug-runner.js",
+            "karma-debug-framework.js",
             "mocha-kotlin-reporter.js",
             "package.json",
             "rollup.config.js",
diff --git a/libraries/tools/kotlin-test-js-runner/karma-debug-framework.js b/libraries/tools/kotlin-test-js-runner/karma-debug-framework.js
new file mode 100644
index 00000000000..fa1ef977553
--- /dev/null
+++ b/libraries/tools/kotlin-test-js-runner/karma-debug-framework.js
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+'use strict';
+
+const initDebug = function (injector) {
+    configureTimeouts(injector)
+};
+
+function configureTimeouts(injector) {
+    const webServer = injector.get('webServer');
+    if (webServer) {
+        // IDE posts http '/run' request to trigger tests (see intellijRunner.js).
+        // If a request executes more than `httpServer.timeout`, it will be timed out.
+        // Disable timeout, as by default httpServer.timeout=120 seconds, not enough for suspended execution.
+        webServer.timeout = 0
+    }
+    const socketServer = injector.get('socketServer');
+    if (socketServer) {
+        // Disable socket.io heartbeat (ping) to avoid browser disconnecting when debugging tests,
+        // because no ping requests are sent when test execution is suspended on a breakpoint.
+        // Default values are not enough for suspended execution:
+        //    'heartbeat timeout' (pingTimeout) = 60000 ms
+        //    'heartbeat interval' (pingInterval) = 25000 ms
+        socketServer.set('heartbeat timeout', 24 * 60 * 60 * 1000);
+        socketServer.set('heartbeat interval', 24 * 60 * 60 * 1000)
+    }
+}
+
+initDebug.$inject = ['injector'];
+
+module.exports = {
+    'framework:karma-kotlin-debug': ['factory', initDebug]
+};
\ No newline at end of file
diff --git a/libraries/tools/kotlin-test-js-runner/karma-debug-runner.js b/libraries/tools/kotlin-test-js-runner/karma-debug-runner.js
index 5d6c356be41..1e95a974398 100644
--- a/libraries/tools/kotlin-test-js-runner/karma-debug-runner.js
+++ b/libraries/tools/kotlin-test-js-runner/karma-debug-runner.js
@@ -5,7 +5,7 @@
 
 'use strict';
 
-import {configureBrowsers, fixMochaTimeout} from "./src/DebugConfigurator";
+import {configureBrowsers, fixBrowserActivityTimeout, fixMochaTimeout} from "./src/DebugConfigurator";
 
 const karma = require('karma');
 
@@ -17,6 +17,7 @@ karmaConfig.singleRun = false;
 
 configureBrowsers(karmaConfig);
 fixMochaTimeout(karmaConfig);
+fixBrowserActivityTimeout(karmaConfig);
 
 const Server = karma.Server;
 const server = new Server(karmaConfig, function (exitCode) {
diff --git a/libraries/tools/kotlin-test-js-runner/rollup.config.js b/libraries/tools/kotlin-test-js-runner/rollup.config.js
index 60c9576901c..b0e8871231e 100644
--- a/libraries/tools/kotlin-test-js-runner/rollup.config.js
+++ b/libraries/tools/kotlin-test-js-runner/rollup.config.js
@@ -32,6 +32,13 @@ export default [
             format: 'cjs'
         }
     },
+    {
+        input: './karma-debug-framework.js',
+        output: {
+            file: 'lib/karma-debug-framework.js',
+            format: 'cjs'
+        }
+    },
     {
         input: './karma-kotlin-reporter.js',
         external: ['path', 'util'],
diff --git a/libraries/tools/kotlin-test-js-runner/src/DebugConfigurator.js b/libraries/tools/kotlin-test-js-runner/src/DebugConfigurator.js
index 574c5fc26e6..118596e2c4b 100644
--- a/libraries/tools/kotlin-test-js-runner/src/DebugConfigurator.js
+++ b/libraries/tools/kotlin-test-js-runner/src/DebugConfigurator.js
@@ -85,4 +85,8 @@ export function fixMochaTimeout(config) {
         console.error('config.client is not an object');
         process.exit(1);
     }
+}
+
+export function fixBrowserActivityTimeout(config) {
+    config.browserNoActivityTimeout = null
 }
\ No newline at end of file