You can also block access to all websites except those you specify.
Open the main program window of your ESET Windows product.
Press the F5 key to access Advanced setup.
Click Web and Email → Web access protection and expand URL Address Management. Click Edit next to Address list.
Follow the instructions in the section above to add a wildcard (*) to the list of blocked addresses.
Select the List of allowed addresses and follow the instructions from steps 4-5 above to add the URLs for websites you want to allow.