If you have read How to [Create] a brand new profile, you'll have no trouble creating multiple profiles at once. Haven't read it? We've got you too!
On the "Profiles" tab, locate the "Create profile" button.
Click the downward arrow next to the "Create profile" button.
From the dropdown menu, select "Batch create".
Then you'll be directed to the detailed Create profile page.
The difference is that there is an option that lets you set the number of profiles you would like to create.
Note: The system allows max 100 profiles to be batch created at one time. The batch created profiles will have all the exact same info, including proxy and fingerprint.