Why is the connection faster if I use the browser extension instead of the mudfish launcher?
Ooops… Really? Was it same even you’d set same mudfish node?
Yes, I set them both on the same node.
For mudfish program, did you try to change Connection Protocols to TCP based? Not sure it’s related with MTU.
Using Full VPN fixes it, but it uses a lot of traffic 
At this moment I’m confused. Are you meaning that with Full VPN mode the connection speed becomes same comparing with the browser extension?