I've recently been using Firefox for work, due to this I use a cisco VPN, but everytime I turn it on, fire fox stops working by saying that the proxy refused the connection. I tried using chrome and it worked fine. I've rebooted my router and phone but still same the issue keeps happening, this doesn't happen when using Firefox on VPN on my laptop, just on my phone. Any help on this?

Phone: Samsung S22 Firefox version: 132.0.2