To enable logging, launch Chrome with these command line flags: --enable-logging=stderr --v=1 # Output will be printed to standard error (eg. printed in the console) and to the debugger --enable-logging=stderr --v=1 > log.txt 2>&1 # Capture stderr and stdout to a log file This will turn on full logging support (INFO, WARNING, ERROR, and VERBOSE0 for >=M9). --enable-logging=stderr enables both logg