diff --git a/requirements.txt b/requirements.txt
index 58faf54d3f8..f144a905b20 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -60,7 +60,8 @@ pytest-metadata==3.1.1
 pytest-ordering==0.6
 pytest-rerunfailures==14.0;python_version<"3.9"
 pytest-rerunfailures==15.1;python_version>="3.9"
-pytest-xdist==3.6.1
+pytest-xdist==3.6.1;python_version<"3.9"
+pytest-xdist==3.7.0;python_version>="3.9"
 parameterized==0.9.0
 behave==1.2.6
 soupsieve==2.7
diff --git a/seleniumbase/__version__.py b/seleniumbase/__version__.py
index 5173bc46dcb..9958ccb6fb9 100755
--- a/seleniumbase/__version__.py
+++ b/seleniumbase/__version__.py
@@ -1,2 +1,2 @@
 # seleniumbase package
-__version__ = "4.39.0"
+__version__ = "4.39.1"
diff --git a/seleniumbase/console_scripts/sb_mkrec.py b/seleniumbase/console_scripts/sb_mkrec.py
index 01ca9cfe431..7f72eb7fde7 100644
--- a/seleniumbase/console_scripts/sb_mkrec.py
+++ b/seleniumbase/console_scripts/sb_mkrec.py
@@ -192,8 +192,9 @@ def main():
             elif "'" not in start_page:
                 used_sp = "'%s'" % start_page
             data.append(
-                "            self.uc_open_with_disconnect(\n"
-                "                %s\n"
+                "            self.activate_cdp_mode(\n"
+                "                %s,\n"
+                "                recorder=True,\n"
                 "            )" % used_sp
             )
         else:
diff --git a/seleniumbase/core/browser_launcher.py b/seleniumbase/core/browser_launcher.py
index eb30a46053e..963042aab12 100644
--- a/seleniumbase/core/browser_launcher.py
+++ b/seleniumbase/core/browser_launcher.py
@@ -108,7 +108,9 @@ def make_driver_executable_if_not(driver_path):
         shared_utils.make_executable(driver_path)
 
 
-def extend_driver(driver, proxy_auth=False, use_uc=True):
+def extend_driver(
+    driver, proxy_auth=False, use_uc=True, recorder_ext=False
+):
     # Extend the driver with new methods
     driver.default_find_element = driver.find_element
     driver.default_find_elements = driver.find_elements
@@ -234,6 +236,14 @@ def extend_driver(driver, proxy_auth=False, use_uc=True):
     driver.switch_to_tab = DM.switch_to_tab
     driver.switch_to_frame = DM.switch_to_frame
     driver.reset_window_size = DM.reset_window_size
+    if recorder_ext:
+        from seleniumbase.js_code.recorder_js import recorder_js
+        recorder_code = (
+            """window.onload = function() { %s };""" % recorder_js
+        )
+        driver.execute_cdp_cmd(
+            "Page.addScriptToEvaluateOnNewDocument", {"source": recorder_code}
+        )
     if hasattr(driver, "proxy"):
         driver.set_wire_proxy = DM.set_wire_proxy
     if proxy_auth:
@@ -2542,6 +2552,7 @@ def _set_chrome_options(
     included_disabled_features.append("PrivacySandboxSettings4")
     included_disabled_features.append("SidePanelPinning")
     included_disabled_features.append("UserAgentClientHint")
+    included_disabled_features.append("DisableLoadExtensionCommandLineSwitch")
     for item in extra_disabled_features:
         if item not in included_disabled_features:
             included_disabled_features.append(item)
@@ -2819,6 +2830,8 @@ def get_driver(
     if headless2 and browser_name == constants.Browser.FIREFOX:
         headless2 = False  # Only for Chromium
         headless = True
+    if binary_location and isinstance(binary_location, str):
+        binary_location = binary_location.strip()
     if (
         is_using_uc(undetectable, browser_name)
         and binary_location
@@ -3014,6 +3027,8 @@ def get_driver(
     proxy_pass = None
     proxy_scheme = "http"
     if proxy_string:
+        # (The code below was for the Chrome 137 extension fix)
+        # sb_config._cdp_proxy = proxy_string
         username_and_password = None
         if "@" in proxy_string:
             # Format => username:password@hostname:port
@@ -4450,6 +4465,9 @@ def get_local_driver(
         included_disabled_features.append("PrivacySandboxSettings4")
         included_disabled_features.append("SidePanelPinning")
         included_disabled_features.append("UserAgentClientHint")
+        included_disabled_features.append(
+            "DisableLoadExtensionCommandLineSwitch"
+        )
         for item in extra_disabled_features:
             if item not in included_disabled_features:
                 included_disabled_features.append(item)
@@ -5328,7 +5346,9 @@ def get_local_driver(
                             driver = webdriver.Chrome(
                                 service=service, options=chrome_options
                             )
-                            return extend_driver(driver, proxy_auth, use_uc)
+                            return extend_driver(
+                                driver, proxy_auth, use_uc, recorder_ext
+                            )
                     if not auto_upgrade_chromedriver:
                         raise  # Not an obvious fix.
                     else:
@@ -5580,11 +5600,15 @@ def get_local_driver(
                                 'Emulation.setDeviceMetricsOverride',
                                 set_device_metrics_override
                             )
-                return extend_driver(driver, proxy_auth, use_uc)
+                return extend_driver(
+                    driver, proxy_auth, use_uc, recorder_ext
+                )
             else:  # Running headless on Linux (and not using --uc)
                 try:
                     driver = webdriver.Chrome(options=chrome_options)
-                    return extend_driver(driver, proxy_auth, use_uc)
+                    return extend_driver(
+                        driver, proxy_auth, use_uc, recorder_ext
+                    )
                 except Exception as e:
                     if not hasattr(e, "msg"):
                         raise
@@ -5606,7 +5630,9 @@ def get_local_driver(
                             driver = webdriver.Chrome(
                                 service=service, options=chrome_options
                             )
-                            return extend_driver(driver, proxy_auth, use_uc)
+                            return extend_driver(
+                                driver, proxy_auth, use_uc, recorder_ext
+                            )
                     mcv = None  # Major Chrome Version
                     if "Current browser version is " in e.msg:
                         line = e.msg.split("Current browser version is ")[1]
@@ -5649,7 +5675,9 @@ def get_local_driver(
                                 service=service,
                                 options=chrome_options,
                             )
-                            return extend_driver(driver, proxy_auth, use_uc)
+                            return extend_driver(
+                                driver, proxy_auth, use_uc, recorder_ext
+                            )
                     # Use the virtual display on Linux during headless errors
                     logging.debug(
                         "\nWarning: Chrome failed to launch in"
@@ -5667,7 +5695,9 @@ def get_local_driver(
                     driver = webdriver.Chrome(
                         service=service, options=chrome_options
                     )
-                    return extend_driver(driver, proxy_auth, use_uc)
+                    return extend_driver(
+                        driver, proxy_auth, use_uc, recorder_ext
+                    )
         except Exception as original_exception:
             if use_uc:
                 raise
@@ -5677,7 +5707,9 @@ def get_local_driver(
                 driver = webdriver.Chrome(
                     service=service, options=chrome_options
                 )
-                return extend_driver(driver, proxy_auth, use_uc)
+                return extend_driver(
+                    driver, proxy_auth, use_uc, recorder_ext
+                )
             if user_data_dir:
                 print("\nUnable to set user_data_dir while starting Chrome!\n")
                 raise
@@ -5704,7 +5736,9 @@ def get_local_driver(
             )
             try:
                 driver = webdriver.Chrome(service=service)
-                return extend_driver(driver, proxy_auth, use_uc)
+                return extend_driver(
+                    driver, proxy_auth, use_uc, recorder_ext
+                )
             except Exception:
                 raise original_exception
     else:
diff --git a/seleniumbase/extensions/recorder.zip b/seleniumbase/extensions/recorder.zip
index 257fcd562d8..79a4870afae 100644
Binary files a/seleniumbase/extensions/recorder.zip and b/seleniumbase/extensions/recorder.zip differ
diff --git a/seleniumbase/undetected/cdp_driver/browser.py b/seleniumbase/undetected/cdp_driver/browser.py
index 1a991f84f57..3d99d0222ff 100644
--- a/seleniumbase/undetected/cdp_driver/browser.py
+++ b/seleniumbase/undetected/cdp_driver/browser.py
@@ -292,6 +292,7 @@ async def get(
             _cdp_locale = None
             _cdp_platform = None
             _cdp_geolocation = None
+            _cdp_recorder = None
             if (
                 hasattr(sb_config, "_cdp_timezone") and sb_config._cdp_timezone
             ):
@@ -330,6 +331,8 @@ async def get(
                 _cdp_geolocation = kwargs["geolocation"]
             elif "geoloc" in kwargs:
                 _cdp_geolocation = kwargs["geoloc"]
+            if "recorder" in kwargs:
+                _cdp_recorder = kwargs["recorder"]
             if _cdp_timezone:
                 await connection.send(cdp.page.navigate("about:blank"))
                 await connection.set_timezone(_cdp_timezone)
@@ -344,9 +347,37 @@ async def get(
                 await connection.send(cdp.page.navigate("about:blank"))
                 await connection.set_geolocation(_cdp_geolocation)
             # Use the tab to navigate to new url
+            if (
+                hasattr(sb_config, "_cdp_proxy")
+                and "@" in sb_config._cdp_proxy
+                and sb_config._cdp_proxy
+                and "auth" not in kwargs
+            ):
+                username_and_password = sb_config._cdp_proxy.split("@")[0]
+                proxy_user = username_and_password.split(":")[0]
+                proxy_pass = username_and_password.split(":")[1]
+                await connection.set_auth(
+                    proxy_user, proxy_pass, self.tabs[0]
+                )
+                time.sleep(0.25)
+            elif "auth" in kwargs and kwargs["auth"] and ":" in kwargs["auth"]:
+                username_and_password = kwargs["auth"]
+                proxy_user = username_and_password.split(":")[0]
+                proxy_pass = username_and_password.split(":")[1]
+                await connection.set_auth(
+                    proxy_user, proxy_pass, self.tabs[0]
+                )
+                time.sleep(0.25)
             frame_id, loader_id, *_ = await connection.send(
                 cdp.page.navigate(url)
             )
+            if _cdp_recorder:
+                pass  # (The code below was for the Chrome 137 extension fix)
+                '''from seleniumbase.js_code.recorder_js import recorder_js
+                recorder_code = (
+                    """window.onload = function() { %s };""" % recorder_js
+                )
+                await connection.send(cdp.runtime.evaluate(recorder_code))'''
             # Update the frame_id on the tab
             connection.frame_id = frame_id
             connection.browser = self
diff --git a/seleniumbase/undetected/cdp_driver/cdp_util.py b/seleniumbase/undetected/cdp_driver/cdp_util.py
index fda6ce9451f..945f45871d3 100644
--- a/seleniumbase/undetected/cdp_driver/cdp_util.py
+++ b/seleniumbase/undetected/cdp_driver/cdp_util.py
@@ -360,8 +360,10 @@ async def start(
     except Exception:
         time.sleep(0.15)
         driver = await Browser.create(config)
-    if proxy and "@" in str(proxy):
-        time.sleep(0.15)
+    if proxy:
+        sb_config._cdp_proxy = proxy
+        if "@" in str(proxy):
+            time.sleep(0.15)
     if lang:
         sb_config._cdp_locale = lang
     elif "locale" in kwargs:
@@ -402,10 +404,14 @@ async def start_async(*args, **kwargs) -> Browser:
     binary_location = None
     if "browser_executable_path" in kwargs:
         binary_location = kwargs["browser_executable_path"]
+        if binary_location and isinstance(binary_location, str):
+            binary_location = binary_location.strip()
     else:
         binary_location = detect_b_ver.get_binary_location("google-chrome")
-        if binary_location and not os.path.exists(binary_location):
-            binary_location = None
+        if binary_location and isinstance(binary_location, str):
+            binary_location = binary_location.strip()
+            if not os.path.exists(binary_location):
+                binary_location = None
     if (
         shared_utils.is_chrome_130_or_newer(binary_location)
         and "user_data_dir" in kwargs
@@ -438,10 +444,14 @@ def start_sync(*args, **kwargs) -> Browser:
     binary_location = None
     if "browser_executable_path" in kwargs:
         binary_location = kwargs["browser_executable_path"]
+        if binary_location and isinstance(binary_location, str):
+            binary_location = binary_location.strip()
     else:
         binary_location = detect_b_ver.get_binary_location("google-chrome")
-        if binary_location and not os.path.exists(binary_location):
-            binary_location = None
+        if binary_location and isinstance(binary_location, str):
+            binary_location = binary_location.strip()
+            if not os.path.exists(binary_location):
+                binary_location = None
     if (
         shared_utils.is_chrome_130_or_newer(binary_location)
         and "user_data_dir" in kwargs
diff --git a/seleniumbase/undetected/cdp_driver/config.py b/seleniumbase/undetected/cdp_driver/config.py
index b11228ea59d..e701bb4a801 100644
--- a/seleniumbase/undetected/cdp_driver/config.py
+++ b/seleniumbase/undetected/cdp_driver/config.py
@@ -144,7 +144,8 @@ def __init__(
             "--disable-features=IsolateOrigins,site-per-process,Translate,"
             "InsecureDownloadWarnings,DownloadBubble,DownloadBubbleV2,"
             "OptimizationTargetPrediction,OptimizationGuideModelDownloading,"
-            "SidePanelPinning,UserAgentClientHint,PrivacySandboxSettings4",
+            "SidePanelPinning,UserAgentClientHint,PrivacySandboxSettings4,"
+            "DisableLoadExtensionCommandLineSwitch",
         ]
 
     @property
diff --git a/seleniumbase/undetected/cdp_driver/connection.py b/seleniumbase/undetected/cdp_driver/connection.py
index 8bcdc82ff36..ecb7f13b345 100644
--- a/seleniumbase/undetected/cdp_driver/connection.py
+++ b/seleniumbase/undetected/cdp_driver/connection.py
@@ -378,6 +378,36 @@ async def set_geolocation(self, geolocation: Optional[tuple] = None):
             accuracy=100,
         ))
 
+    async def set_auth(self, username, password, tab):
+        async def auth_challenge_handler(event: cdp.fetch.AuthRequired):
+            await tab.send(
+                cdp.fetch.continue_with_auth(
+                    request_id=event.request_id,
+                    auth_challenge_response=cdp.fetch.AuthChallengeResponse(
+                        response="ProvideCredentials",
+                        username=username,
+                        password=password,
+                    ),
+                )
+            )
+
+        async def req_paused(event: cdp.fetch.RequestPaused):
+            await tab.send(
+                cdp.fetch.continue_request(request_id=event.request_id)
+            )
+
+        tab.add_handler(
+            cdp.fetch.RequestPaused,
+            lambda event: asyncio.create_task(req_paused(event)),
+        )
+
+        tab.add_handler(
+            cdp.fetch.AuthRequired,
+            lambda event: asyncio.create_task(auth_challenge_handler(event)),
+        )
+
+        await tab.send(cdp.fetch.enable(handle_auth_requests=True))
+
     def __getattr__(self, item):
         """:meta private:"""
         try:
diff --git a/setup.py b/setup.py
index 76ea8d31143..899bdbaded7 100755
--- a/setup.py
+++ b/setup.py
@@ -211,7 +211,8 @@
         "pytest-ordering==0.6",
         'pytest-rerunfailures==14.0;python_version<"3.9"',
         'pytest-rerunfailures==15.1;python_version>="3.9"',
-        'pytest-xdist==3.6.1',
+        'pytest-xdist==3.6.1;python_version<"3.9"',
+        'pytest-xdist==3.7.0;python_version>="3.9"',
         'parameterized==0.9.0',
         "behave==1.2.6",
         'soupsieve==2.7',
@@ -268,7 +269,7 @@
             'pdfminer.six==20250324;python_version<"3.9"',
             'pdfminer.six==20250506;python_version>="3.9"',
             'cryptography==39.0.2;python_version<"3.9"',
-            'cryptography==45.0.2;python_version>="3.9"',
+            'cryptography==45.0.3;python_version>="3.9"',
             'cffi==1.17.1',
             "pycparser==2.22",
         ],