Is Unblock Proxy safe?

Unblock Proxy routes all of your browser traffic through a hardcoded third-party proxy once its toggle is switched on.

When the popup's "Unblock" switch is turned on, the extension installs a PAC script that sends every URL you visit — not just the blocked site you meant to unblock — to one of four hardcoded proxy IPs. It authenticates each connection with a single hardcoded username and password that is baked into the extension and shared by every install, whether on the free or paid plan.