Is Обход блокировок Рунета safe?

This extension routes blocked Russian-government-blocked sites through a PAC-based proxy.

It provides access to sites blocked by Roskomnadzor by proxying only blocked sites while leaving other browsing unchanged. It installs a PAC script that works through antizapret.prostovpn.org servers and updates the PAC script every 12 hours. Its toolbar icon shows the number of unblocked domains on the current page, including subrequests when marked with “%”.