Browser lock scams are sites who often open as a popup and tell you : " Your browser has been locked" as you are accused of violation/ distribution of content or whatever the scammer says ( they know hot to make it look really legit), using fake credentials as they were a government agency like FBI for example.
They will then ask you to pay an amount of money in order to unlock your browser. They usually look like in the pic and can trace your IP or translate the content in you language ( so don't be fooled by this fake credentials)
NOTE: NO GOVERNMENT AGENCY WILL EVER ASK YOU FOR MONEY IN ORDER UNLOCK YOUR BROWSER OR PC OR WHATEVER, NOR WILL THEY ASK OR SAVE ANY OF YOUR PERSONAL INFORMATION.
HOW TO GET OUT OF THIS BROWSER LOCK:
IF IT CAN'T BE CLOSED SIMPLY BY CLOSE IN YOUR BROWSER THEN :
-OPEN TASK MANAGER ( ctrl+alt+del) AND UNDER PROCESSES SEARCH FOR YOU BROWSER ( ex. CHROME , FIREFOX, IE ) AND CLICK ON END TASK. NOTICE WHEN YOU WILL OPEN AGAIN YOUR BROWSER START A NEW SEASON AND DO NOT OPEN THE PREVIOUS ONE AS IT WILL GET YOU TO THE SAME SITE AGAIN .
-IF YOU REALLY WANT TO DELETE ANY TRACE OF THE SCAM, CLEAN YOUR BROWSER HISTORY AND COOKIE ( from the settings of your browser or using a program like ccleaner)