WebPreferences.proxy_config

• accept_charset
• accept_language
• allow_file_access_from_file_url
• allow_running_insecure_content
• allow_scripts_to_access_clipboard
• allow_scripts_to_close_windows
• allow_scripts_to_open_windows
• allow_universal_access_from_file_url
• default_encoding
• enable_app_cache
• enable_dart
• enable_databases
• enable_gpu_acceleration
• enable_javascript
• enable_local_storage
• enable_plugins
• enable_remote_fonts
• enable_smooth_scrolling
• enable_web_audio
• enable_web_gl
• enable_web_security
• load_images_automatically
• max_http_cache_storage
• proxy_config
• shrink_standalone_images_to_fit
• user_script
• user_stylesheet