• Stop Test at Document Complete
  Typically, tests run until all activity stops.
• Ignore SSL Certificate Errors
  e.g. Name mismatch, Self-signed certificates, etc.
• Capture network packet trace (tcpdump)
• Save response bodies
  For text resources (HTML, CSS, etc.)
• Preserve original User Agent string
  Do not add PTST to the browser UA string
• User Agent String
  (Custom UA String)
• Append to UA String
• Disable AVIF image support
  Firefox and Chromium-based browsers only
• Disable WEBP image support
  Firefox and Chromium-based browsers only
• Capture Full Size Video
  Enables full size screenshots in the filmstrip
• Minimum test duration
  Capture data for at least... seconds
• Custom headers Add custom headers to all network requests emitted from the browser (type in or read from a text file)
• Inject Script JavaScript to run after the document has started loading (type in or read from a text file)
• Inject script into all frames and run before any page scripts run (Chrome-only)

• Run Carbon Control (Experimental: Measures carbon footprint.)
• Run Lighthouse Audit (Uses a "3G Fast" connection for mobile or "4G Fast" connection for desktop independent of test settings)
• Capture Dev Tools Timeline
• Enable v8 Sampling Profiler (much larger traces)
• Capture V8 Runtime Call Stats
• Capture Chrome Trace (about://tracing)
• Trace Categories
  (when tracing is enabled)
• Capture Network Log
• Enable Data Reduction
  Chrome 34+ on Android
• Use Chrome dev tools traffic-shaping (not recommended)
• Host Resolver Rules
  i.e. MAP * 1.2.3.4
• Command-line
  Custom options

• Script includes sensitive data
  The script will be discarded and the HTTP headers will not be available in the results
• Discard all HTTP headers

Block Requests Containing (URL substrings)... Space-separated list (type in or read from a text file)

Block Domains (full host names)... Space-separated list of domains (type in or read from a text file)

Simulate failure of specified domains. This is done by re-routing all requests for the domains to blackhole.webpagetest.org which will silently drop all requests.

Hosts to fail (one host per line)... Type in or read from a text file