diff --git a/Ladybird/AppKit/main.mm b/Ladybird/AppKit/main.mm
index 0f6a42b71fd..030ebae8193 100644
--- a/Ladybird/AppKit/main.mm
+++ b/Ladybird/AppKit/main.mm
@@ -4,6 +4,7 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
+#include <AK/Enumerate.h>
 #include <BrowserSettings/Defaults.h>
 #include <Ladybird/MachPortServer.h>
 #include <Ladybird/Types.h>
@@ -12,6 +13,7 @@
 #include <LibCore/EventLoop.h>
 #include <LibGfx/Font/FontDatabase.h>
 #include <LibMain/Main.h>
+#include <LibWebView/ChromeProcess.h>
 #include <LibWebView/CookieJar.h>
 #include <LibWebView/Database.h>
 #include <LibWebView/ProcessManager.h>
@@ -27,6 +29,45 @@
 #    error "This project requires ARC"
 #endif
 
+static Vector<URL::URL> sanitize_urls(Vector<ByteString> const& raw_urls)
+{
+    Vector<URL::URL> sanitized_urls;
+    for (auto const& raw_url : raw_urls) {
+        if (auto url = WebView::sanitize_url(raw_url); url.has_value())
+            sanitized_urls.append(url.release_value());
+    }
+
+    if (sanitized_urls.is_empty()) {
+        URL::URL new_tab_page_url = Browser::default_new_tab_url;
+        sanitized_urls.append(move(new_tab_page_url));
+    }
+
+    return sanitized_urls;
+}
+
+enum class NewWindow {
+    No,
+    Yes,
+};
+
+static void open_urls_from_client(Vector<ByteString> const& raw_urls, NewWindow new_window)
+{
+    ApplicationDelegate* delegate = [NSApp delegate];
+    Tab* tab = new_window == NewWindow::Yes ? nil : [delegate activeTab];
+
+    auto urls = sanitize_urls(raw_urls);
+
+    for (auto [i, url] : enumerate(urls)) {
+        auto activate_tab = i == 0 ? Web::HTML::ActivateTab::Yes : Web::HTML::ActivateTab::No;
+
+        auto* controller = [delegate createNewTab:url
+                                          fromTab:tab
+                                      activateTab:activate_tab];
+
+        tab = (Tab*)[controller window];
+    }
+}
+
 ErrorOr<int> serenity_main(Main::Arguments arguments)
 {
     AK::set_rich_debug_enabled(true);
@@ -42,12 +83,13 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     Gfx::FontDatabase::set_default_font_query("Katica 10 400 0");
     Gfx::FontDatabase::set_fixed_width_font_query("Csilla 10 400 0");
 
-    Vector<StringView> raw_urls;
+    Vector<ByteString> raw_urls;
     Vector<ByteString> certificates;
     StringView webdriver_content_ipc_path;
     bool use_gpu_painting = false;
     bool debug_web_content = false;
     bool log_all_js_exceptions = false;
+    bool new_window = false;
 
     Core::ArgsParser args_parser;
     args_parser.set_general_help("The Ladybird web browser");
@@ -57,8 +99,23 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     args_parser.add_option(debug_web_content, "Wait for debugger to attach to WebContent", "debug-web-content");
     args_parser.add_option(certificates, "Path to a certificate file", "certificate", 'C', "certificate");
     args_parser.add_option(log_all_js_exceptions, "Log all JavaScript exceptions", "log-all-js-exceptions");
+    args_parser.add_option(new_window, "Force opening in a new window", "new-window", 'n');
     args_parser.parse(arguments);
 
+    WebView::ChromeProcess chrome_process;
+    if (TRY(chrome_process.connect(raw_urls, new_window)) == WebView::ChromeProcess::ProcessDisposition::ExitProcess) {
+        outln("Opening in existing process");
+        return 0;
+    }
+
+    chrome_process.on_new_tab = [&](auto const& raw_urls) {
+        open_urls_from_client(raw_urls, NewWindow::No);
+    };
+
+    chrome_process.on_new_window = [&](auto const& raw_urls) {
+        open_urls_from_client(raw_urls, NewWindow::Yes);
+    };
+
     WebView::ProcessManager::initialize();
 
     auto mach_port_server = make<Ladybird::MachPortServer>();
@@ -74,17 +131,6 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
     // FIXME: Create an abstraction to re-spawn the RequestServer and re-hook up its client hooks to each tab on crash
     TRY([application launchRequestServer:certificates]);
 
-    URL::URL new_tab_page_url = Browser::default_new_tab_url;
-    Vector<URL::URL> initial_urls;
-
-    for (auto const& raw_url : raw_urls) {
-        if (auto url = WebView::sanitize_url(raw_url); url.has_value())
-            initial_urls.append(url.release_value());
-    }
-
-    if (initial_urls.is_empty())
-        initial_urls.append(new_tab_page_url);
-
     StringBuilder command_line_builder;
     command_line_builder.join(' ', arguments.strings);
     Ladybird::WebContentOptions web_content_options {
@@ -95,8 +141,8 @@ ErrorOr<int> serenity_main(Main::Arguments arguments)
         .log_all_js_exceptions = log_all_js_exceptions ? Ladybird::LogAllJSExceptions::Yes : Ladybird::LogAllJSExceptions::No,
     };
 
-    auto* delegate = [[ApplicationDelegate alloc] init:move(initial_urls)
-                                         newTabPageURL:move(new_tab_page_url)
+    auto* delegate = [[ApplicationDelegate alloc] init:sanitize_urls(raw_urls)
+                                         newTabPageURL:URL::URL { Browser::default_new_tab_url }
                                          withCookieJar:move(cookie_jar)
                                      webContentOptions:web_content_options
                                webdriverContentIPCPath:webdriver_content_ipc_path];