Hi, I have a similar problem were from a laptop on Wifi 5GHz on USB port antenna, I'm on remote dektop to a wired PC. Both are on Firefox session. On the laptop, refresh is blocking every 5 seconds during 5(+) seconds. It can see it on Task Manager scrolling windows freezing and resuming. The only way to solve it, is to close the laptop Firefox and restart it, or use Firefox on remote desktop session. When it freeze, all screen and commands refresh is coming back rapidly when it resume like emptying the buffer and goes normally for 3-4 seconds and so on. I wish to know what is doing this and solve it if it's a custom configuration. Thanks for watching and anwsering.