For 150 tabs open using the test script, Firefox nightly takes 6 min 14 on the test system, uses 2GB and stays responsive.
For the same test, Chrome takes 28 min 55 and is unusable during loading.
An optimized version of the script has been made for Chrome as an attempt to work-around Chrome's limitations and got an improved loading time of 27 min 58, while using 5GB of memory. Outch."
Link to Original Source