Spoof-when-possible browser personas, Tier-2 telemetry kill + artifact wipe, UI polish

Browser: identity persona dropdown (blend Windows-Chrome / Firefox / mac-Safari / hardened / custom) + cookie policy dropdown. Blend personas relax RFP/FPI/strict-TP so the machine looks normal while still hiding behind the chain. Persona TZ applied via env var; UA / language / locale / screen via user.js. WebRTC still forced off (it leaks real IP). Privacy: Telemetry kill toggle (DiagTrack, Activity History, ad ID, Cortana, scheduled tasks) with full snapshot/restore. One-button forensic artifact wipe (TEMP, Recent, Jump Lists, Prefetch, MRU, clipboard). UI: neon palette, glow card borders, gradient header banner.
Co-authored-by: Cursor <cursoragent@cursor.com>

proxy_chain_manager/browser_launcher.py

@@ -1,13 +1,14 @@
 from __future__ import annotations
 
 import logging
+import os
 import shutil
 import subprocess
 import time
 from dataclasses import dataclass
 from pathlib import Path
 
-from .browser_profile import FirefoxHardening, ensure_firefox_profile
+from .browser_profile import FirefoxHardening, ensure_firefox_profile, persona_env
 from .paths import app_data_dir
 
 log = logging.getLogger(__name__)
@@ -29,6 +30,8 @@ class BrowserConfig:
     first_party_isolation: bool = True
     strict_tracking_protection: bool = True
     timezone_utc: bool = True
+    persona: str = "blend_windows_chrome"
+    cookie_mode: str = "block_third_party"
 
 
 def default_firefox_path() -> str:
@@ -80,6 +83,8 @@ class BrowserSession:
             strict_tracking_protection=cfg.strict_tracking_protection,
             clear_on_shutdown=cfg.clear_on_close,
             timezone_utc=cfg.timezone_utc,
+            persona_key=cfg.persona,
+            cookie_mode=cfg.cookie_mode,
         )
         if cfg.lock_managed_profile:
             ensure_firefox_profile(profile_dir, proxy_host, int(proxy_port), hard)
@@ -89,6 +94,8 @@ class BrowserSession:
             args = [str(exe), "-no-remote", "-profile", str(profile_dir)]
         else:
             args = [str(exe)]
+        env = os.environ.copy()
+        env.update(persona_env(hard))
         try:
             self._proc = subprocess.Popen(
                 args,
@@ -96,6 +103,7 @@ class BrowserSession:
                 stdout=subprocess.DEVNULL,
                 stderr=subprocess.DEVNULL,
                 text=True,
+                env=env,
             )
             # Smoke-check: catch immediate startup crashes and report clearly.
             time.sleep(0.4)