Add --user-data-dir to chrome flags:

Adding a temporary directory as --user-data-dir to chrome flags will
trick chrome into thinking a new user is running chrome, and therefore
wont interfere with the currently running session.

devtools/browser.py

@@ -5,11 +5,13 @@
 import sys
 import subprocess
 import signal
+import tempfile
 
 
 class Browser:
     def __init__(self, debug=None, path=None, headless=True):
         self.pipe = Pipe()
+        self.temp_dir = tempfile.TemporaryDirectory()
 
         if not debug:  # false o None
             stderr = subprocess.DEVNULL
@@ -28,6 +30,7 @@ def __init__(self, debug=None, path=None, headless=True):
 
         new_env = os.environ.copy()
         new_env["CHROMIUM_PATH"] = path
+        new_env["USER_DATA_DIR"] = self.temp_dir.name
         if headless:
             new_env["HEADLESS"] = "--headless"
 
@@ -74,6 +77,7 @@ def close_browser(self):
             self.subprocess.terminate()
         self.subprocess.wait(5)
         self.subprocess.kill()
+        self.temp_dir.cleanup()
 
     def send_command(self, command, params=None, cb=None):
         return self.protocol.send_command(self, command, params, cb)

devtools/chrome_wrapper.py

@@ -26,11 +26,15 @@
 else:
     path = os.environ["CHROMIUM_PATH"]
 
+user_data_dir = os.environ["USER_DATA_DIR"]
+
 cli = [
     path,
     "--remote-debugging-pipe",
     "--disable-breakpad",
     "--allow-file-access-from-files",
+    f"--user-data-dir={user_data_dir}",
+    "--no-first-run"
 ]
 
 if "HEADLESS" in os.environ: