diff --git a/SafeExamBrowser.Browser/BrowserApplicationController.cs b/SafeExamBrowser.Browser/BrowserApplicationController.cs
index a38baadc..c7a6884e 100644
--- a/SafeExamBrowser.Browser/BrowserApplicationController.cs
+++ b/SafeExamBrowser.Browser/BrowserApplicationController.cs
@@ -129,7 +129,7 @@ namespace SafeExamBrowser.Browser
 				CachePath = appConfig.BrowserCachePath,
 				LogFile = appConfig.BrowserLogFile,
 				LogSeverity = error ? LogSeverity.Error : (warning ? LogSeverity.Warning : LogSeverity.Info),
-				UserAgent = settings.UseCustomUserAgent ? settings.CustomUserAgent : string.Empty
+				UserAgent = InitializeUserAgent()
 			};
 
 			cefSettings.CefCommandLineArgs.Add("touch-events", "enabled");
@@ -165,5 +165,24 @@ namespace SafeExamBrowser.Browser
 			instances.Remove(instances.FirstOrDefault(i => i.Id == id));
 			logger.Info($"Browser instance {id} was terminated.");
 		}
+
+		/// <summary>
+		/// TODO: Workaround to correctly set the user agent due to missing support for request interception for requests made by service workers.
+		///       Remove once CEF fully supports service workers and reactivate the functionality in <see cref="Handlers.RequestHandler"/>!
+		/// </summary>
+		private string InitializeUserAgent()
+		{
+			var osVersion = $"{Environment.OSVersion.Version.Major}.{Environment.OSVersion.Version.Minor}";
+			var sebVersion = $"SEB/{appConfig.ProgramVersion}";
+
+			if (settings.UseCustomUserAgent)
+			{
+				return $"{settings.CustomUserAgent} {sebVersion}";
+			}
+			else
+			{
+				return $"Mozilla/5.0 (Windows NT {osVersion}) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/{Cef.ChromiumVersion} {sebVersion}";
+			}
+		}
 	}
 }
diff --git a/SafeExamBrowser.Browser/Handlers/ContextMenuHandler.cs b/SafeExamBrowser.Browser/Handlers/ContextMenuHandler.cs
index 39f15716..26e44431 100644
--- a/SafeExamBrowser.Browser/Handlers/ContextMenuHandler.cs
+++ b/SafeExamBrowser.Browser/Handlers/ContextMenuHandler.cs
@@ -13,7 +13,7 @@ using BrowserSettings = SafeExamBrowser.Contracts.Configuration.Settings.Browser
 namespace SafeExamBrowser.Browser.Handlers
 {
 	/// <remarks>
-	/// See https://cefsharp.github.io/api/71.0.0/html/T_CefSharp_IContextMenuHandler.htm.
+	/// See https://cefsharp.github.io/api/73.1.x/html/T_CefSharp_IContextMenuHandler.htm.
 	/// </remarks>
 	internal class ContextMenuHandler : IContextMenuHandler
 	{
diff --git a/SafeExamBrowser.Browser/Handlers/DisplayHandler.cs b/SafeExamBrowser.Browser/Handlers/DisplayHandler.cs
index 40e797d9..169a9d35 100644
--- a/SafeExamBrowser.Browser/Handlers/DisplayHandler.cs
+++ b/SafeExamBrowser.Browser/Handlers/DisplayHandler.cs
@@ -15,7 +15,7 @@ using SafeExamBrowser.Browser.Events;
 namespace SafeExamBrowser.Browser.Handlers
 {
 	/// <remarks>
-	/// See https://cefsharp.github.io/api/71.0.0/html/T_CefSharp_IDisplayHandler.htm.
+	/// See https://cefsharp.github.io/api/73.1.x/html/T_CefSharp_IDisplayHandler.htm.
 	/// </remarks>
 	internal class DisplayHandler : IDisplayHandler
 	{
diff --git a/SafeExamBrowser.Browser/Handlers/DownloadHandler.cs b/SafeExamBrowser.Browser/Handlers/DownloadHandler.cs
index 5fced235..4ff6a719 100644
--- a/SafeExamBrowser.Browser/Handlers/DownloadHandler.cs
+++ b/SafeExamBrowser.Browser/Handlers/DownloadHandler.cs
@@ -19,7 +19,7 @@ using BrowserSettings = SafeExamBrowser.Contracts.Configuration.Settings.Browser
 namespace SafeExamBrowser.Browser.Handlers
 {
 	/// <remarks>
-	/// See https://cefsharp.github.io/api/71.0.0/html/T_CefSharp_IDownloadHandler.htm.
+	/// See https://cefsharp.github.io/api/73.1.x/html/T_CefSharp_IDownloadHandler.htm.
 	/// </remarks>
 	internal class DownloadHandler : IDownloadHandler
 	{
diff --git a/SafeExamBrowser.Browser/Handlers/KeyboardHandler.cs b/SafeExamBrowser.Browser/Handlers/KeyboardHandler.cs
index a570cbd9..33898547 100644
--- a/SafeExamBrowser.Browser/Handlers/KeyboardHandler.cs
+++ b/SafeExamBrowser.Browser/Handlers/KeyboardHandler.cs
@@ -13,7 +13,7 @@ using SafeExamBrowser.Contracts.UserInterface;
 namespace SafeExamBrowser.Browser.Handlers
 {
 	/// <remarks>
-	/// See https://cefsharp.github.io/api/71.0.0/html/T_CefSharp_IKeyboardHandler.htm.
+	/// See https://cefsharp.github.io/api/73.1.x/html/T_CefSharp_IKeyboardHandler.htm.
 	/// </remarks>
 	internal class KeyboardHandler : IKeyboardHandler
 	{
diff --git a/SafeExamBrowser.Browser/Handlers/LifeSpanHandler.cs b/SafeExamBrowser.Browser/Handlers/LifeSpanHandler.cs
index cb2be37f..d984448f 100644
--- a/SafeExamBrowser.Browser/Handlers/LifeSpanHandler.cs
+++ b/SafeExamBrowser.Browser/Handlers/LifeSpanHandler.cs
@@ -12,7 +12,7 @@ using SafeExamBrowser.Browser.Events;
 namespace SafeExamBrowser.Browser.Handlers
 {
 	/// <remarks>
-	/// See https://cefsharp.github.io/api/71.0.0/html/T_CefSharp_ILifeSpanHandler.htm.
+	/// See https://cefsharp.github.io/api/73.1.x/html/T_CefSharp_ILifeSpanHandler.htm.
 	/// </remarks>
 	internal class LifeSpanHandler : ILifeSpanHandler
 	{
diff --git a/SafeExamBrowser.Browser/Handlers/RequestHandler.cs b/SafeExamBrowser.Browser/Handlers/RequestHandler.cs
index f84b725b..8e90a64a 100644
--- a/SafeExamBrowser.Browser/Handlers/RequestHandler.cs
+++ b/SafeExamBrowser.Browser/Handlers/RequestHandler.cs
@@ -28,7 +28,11 @@ namespace SafeExamBrowser.Browser.Handlers
 
 		public override CefReturnValue OnBeforeResourceLoad(IWebBrowser browserControl, IBrowser browser, IFrame frame, IRequest request, IRequestCallback callback)
 		{
-			AppendCustomUserAgent(request);
+			// TODO: CEF does not yet support intercepting requests from service workers, thus the user agent must be statically set at browser
+			//       startup for now. Once CEF has full support of service workers, the static user agent should be removed and the method below
+			//       reactivated. See https://bitbucket.org/chromiumembedded/cef/issues/2622 for the current status of development.
+			// AppendCustomUserAgent(request);
+
 			ReplaceCustomScheme(request);
 
 			return base.OnBeforeResourceLoad(browserControl, browser, frame, request, callback);