I needed to test how a client’s website behaved under different user sessions, so a colleague suggested I purchase proxy server
https://proxyline.net/en/. It worked perfectly and let me run several simultaneous logins without any conflicts. The stability really surprised me because everything stayed fast even with heavy testing. It helped me spot issues that I would’ve missed otherwise. Honestly, the whole debugging process became way more efficient. Have you used proxies for multi-session QA testing?