diff --git a/browsers.json b/browsers.json
index dd3955c47ea..bd6bd5772d6 100644
--- a/browsers.json
+++ b/browsers.json
@@ -1,65 +1,49 @@
 {
-  "bs_edge_17_windows_10": {
+  "bs_edge_latest_windows_10": {
     "base": "BrowserStack",
     "os_version": "10",
     "browser": "edge",
-    "browser_version": "17.0",
+    "browser_version": "latest",
     "device": null,
     "os": "Windows"
   },
-  "bs_edge_90_windows_10": {
-    "base": "BrowserStack",
-    "os_version": "10",
-    "browser": "edge",
-    "browser_version": "90.0",
-    "device": null,
-    "os": "Windows"
-  },
-  "bs_chrome_90_windows_10": {
+  "bs_chrome_latest_windows_10": {
     "base": "BrowserStack",
     "os_version": "10",
     "browser": "chrome",
-    "browser_version": "90.0",
+    "browser_version": "latest",
     "device": null,
     "os": "Windows"
   },
-  "bs_chrome_79_windows_10": {
+  "bs_chrome_87_windows_10": {
     "base": "BrowserStack",
     "os_version": "10",
     "browser": "chrome",
-    "browser_version": "79.0",
-    "device": null,
-    "os": "Windows"
-  },
-  "bs_firefox_88_windows_10": {
-    "base": "BrowserStack",
-    "os_version": "10",
-    "browser": "firefox",
-    "browser_version": "88.0",
+    "browser_version": "87.0",
     "device": null,
     "os": "Windows"
   },
-  "bs_firefox_72_windows_10": {
+  "bs_firefox_latest_windows_10": {
     "base": "BrowserStack",
     "os_version": "10",
     "browser": "firefox",
-    "browser_version": "72.0",
+    "browser_version": "latest",
     "device": null,
     "os": "Windows"
   },
-  "bs_safari_14_mac_bigsur": {
+  "bs_safari_latest_mac_bigsur": {
     "base": "BrowserStack",
     "os_version": "Big Sur",
     "browser": "safari",
-    "browser_version": "14.0",
+    "browser_version": "latest",
     "device": null,
     "os": "OS X"
   },
-  "bs_safari_12_mac_mojave": {
+  "bs_safari_15_catalina": {
     "base": "BrowserStack",
-    "os_version": "Mojave",
+    "os_version": "Catalina",
     "browser": "safari",
-    "browser_version": "12.0",
+    "browser_version": "13.1",
     "device": null,
     "os": "OS X"
   }
diff --git a/karma.conf.maker.js b/karma.conf.maker.js
index cf5999ba85e..abff3f043b9 100644
--- a/karma.conf.maker.js
+++ b/karma.conf.maker.js
@@ -166,7 +166,7 @@ module.exports = function(codeCoverage, browserstack, watchMode, file) {
     browserNoActivityTimeout: 3e5, // default 10000
     captureTimeout: 3e5, // default 60000,
     browserDisconnectTolerance: 3,
-    concurrency: 5,
+    concurrency: 6,
 
     plugins: plugins
   }