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# -*- coding: utf-8 -*-
# @Time : 2025/1/1
# @Author : wenshao
# @Email : wenshaoguo1026@gmail.com
# @Project : browser-use-webui
# @FileName: context.py
import json
import logging
import os
from browser_use.browser.browser import Browser
from browser_use.browser.context import BrowserContext, BrowserContextConfig
from playwright.async_api import Browser as PlaywrightBrowser
from playwright.async_api import BrowserContext as PlaywrightBrowserContext
from .config import BrowserPersistenceConfig
logger = logging.getLogger(__name__)
class CustomBrowserContext(BrowserContext):
def __init__(
self,
browser: "Browser",
config: BrowserContextConfig = BrowserContextConfig()
):
super(CustomBrowserContext, self).__init__(browser=browser, config=config)
async def _create_context(self, browser: PlaywrightBrowser) -> PlaywrightBrowserContext:
"""Creates a new browser context with anti-detection measures and loads cookies if available."""
# If we have a context, return it directly
# Check if we should use existing context for persistence
if self.browser.config.chrome_instance_path and len(browser.contexts) > 0:
# Connect to existing Chrome instance instead of creating new one
context = browser.contexts[0]
else:
# Original code for creating new context
context = await browser.new_context(
viewport=self.config.browser_window_size,
no_viewport=False,
user_agent=(
"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
"(KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36"
),
java_script_enabled=True,
bypass_csp=self.config.disable_security,
ignore_https_errors=self.config.disable_security,
record_video_dir=self.config.save_recording_path,
record_video_size=self.config.browser_window_size,
)
if self.config.trace_path:
await context.tracing.start(screenshots=True, snapshots=True, sources=True)
# Load cookies if they exist
if self.config.cookies_file and os.path.exists(self.config.cookies_file):
with open(self.config.cookies_file, "r") as f:
cookies = json.load(f)
logger.info(
f"Loaded {len(cookies)} cookies from {self.config.cookies_file}"
)
await context.add_cookies(cookies)
# Expose anti-detection scripts
await context.add_init_script(
"""
// Webdriver property
Object.defineProperty(navigator, 'webdriver', {
get: () => undefined
});
// Languages
Object.defineProperty(navigator, 'languages', {
get: () => ['en-US', 'en']
});
// Plugins
Object.defineProperty(navigator, 'plugins', {
get: () => [1, 2, 3, 4, 5]
});
// Chrome runtime
window.chrome = { runtime: {} };
// Permissions
const originalQuery = window.navigator.permissions.query;
window.navigator.permissions.query = (parameters) => (
parameters.name === 'notifications' ?
Promise.resolve({ state: Notification.permission }) :
originalQuery(parameters)
);
"""
)
return context
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