@myswtest

Got it. Opera Developer.

@idsantos The Opera Developer [beta of the new Opera] works smooth as silk.

@nilssonian

I have some clues about the right click issues, having experienced them all on one computer and not another. Both are loaded with Ubuntu 22.04.2. Both have the same settings in the latest Opera update [and in the latest Vivaldi update, where the problems persist, as well].

My ASUS AMD Ryzen 4800U A15 laptop with GeForce GTX 1660 TI Mobile GPU running NVidia's recommended driver will allow Opera [and Vivaldi] to run without crashing the computer but with occasional short freezes and right click dysfunction as described by all, including your temporary minimize mximize partial solution..

1. Running any lesser GPU driver leads to crashing UBUNTU under Opera.

2. My very old Dell Latitude e6320 runs Opera and Vivaldi without a glitch, same exact settings.

3. Firefox runs well and seamlessly on both.

Conclusion:

Opera [and Vivaldi] should investigate Mozilla's approach, because it is open source, right?**