If the web proxy you’re using stops responding or freezes, you can refresh your browser page or close it. Then, open a new tab and head back to the proxy site. This usually fixes the issue and you can resume your anonymous browsing.
For a proxy browser extension, you have a few more options to try:
Restart your device and make sure you’re connected to the internet before turning on the extension.
Make sure your firewall isn’t preventing the server connection — if you can, pause your firewall while you try to connect.
Remove and re-add the extension to your browser.
Unfortunately, most free proxy servers don’t have a support site or live chat to help resolve any problems you may encounter. I recommend you use a quality VPN service like CyberGhost, which offers troubleshooting guides, a comprehensive support site, and a 24/7 live chat option to resolve your issues. It has a free proxy plugin, but you can try CyberGhost VPN for free for 45 days with the money-back guarantee.