diff --git a/tools/wptrunner/wptrunner/browsers/servodriver.py b/tools/wptrunner/wptrunner/browsers/servodriver.py
index f8f50537740eea..4d86b6c4fa6611 100644
--- a/tools/wptrunner/wptrunner/browsers/servodriver.py
+++ b/tools/wptrunner/wptrunner/browsers/servodriver.py
@@ -62,7 +62,7 @@ def env_extras(**kwargs):
 
 def env_options():
     return {"server_host": "127.0.0.1",
-            "supports_debugger": False}
+            "supports_debugger": True}
 
 
 def update_properties():
@@ -88,9 +88,18 @@ def __init__(self, logger, binary, debug_info=None, webdriver_host="127.0.0.1",
         env["HOST_FILE"] = hosts_path
         env["RUST_BACKTRACE"] = "1"
 
+        if debug_info:
+            env["DELAY_AFTER_ACCEPT"] = env.get("DELAY_SECS", "15")
+
         args = [
             "--hard-fail",
             "--webdriver=%s" % port,
+            "-u", "Servo/wptrunner",
+            # See https://github.com/servo/servo/issues/30080.
+            # For some reason rustls does not like the certificate generated by the WPT tooling.
+            "--ignore-certificate-errors",
+            "--window-size", "800x600",
+            "-Z", "disable-text-aa,load-webfonts-synchronously,replace-surrogates",
             "data:,",
         ]