@andrew84 okey thanks, iam out of that problem right now, coz extension not loading anymore, i dont know why.

@andrew84 Can you try to open website with graphs (tradingview, binance, and so) where is a lot of info get in by websocket

opera 74.0.3911.203 (ubuntu 20.04)
Huge memory leak from Cashback Web Monitor, memory grows by 300mb each 10minutes, after that extension get more then 1gb memory, using browser become impossible.
So, every 30min i'am killing that extension from terminal.
If that will be not fixed soon, moreover will switch to another browser