TABs jump left or right. Happens to opera Dev, Opera regular version, every computer. I think it has to do with some scripting because it happens to most tabs very often but not all. Especially when several tabs open.

Any luck on this? I have the same exact problem.

I have tried:

Disabling hardware acceleration and toggling advanced settings like javascript.
Applying different display drivers
The Opera task manager shows priorty cpu usage on display driver (like 3%), but doesn't match the 100% usage on Task manager
IDLE disable CPU power management is being turned off for sure because I can see it toggle.
no live wallpaper or weird addons active in Opera, animations turned off.

Happens with Edge browser too but after about 45 second delay. So different behavior but same result.
Doesn't happen with Chrome or Firefox

What about updating Opera Beta with fix?

TABs jump left or right. Happens to opera Dev, Opera regular version, every computer. I think it has to do with some scripting because it happens to most tabs very often but not all. Especially when several tabs open.

@donq Yes, of course. It makes no difference. This issue is caused by other apps as well in addition to Opera. Opera is just the one I use every day so it is very annoying. And, it is the first app where I noticed it happening.

@donq Sorry just getting to this. (But, topic is still relevant for many users) Edge is Chromium based. No additional tools. My temp fix is running a .bat file with powercfg flags to turn back on CPU idle for both AC and Battery profiles. Running powercfg script after startup of Opera calms it back down. (But have to do this everytime I open Opera, Opera beta, Opera dev) It is related to CPU idle being disabled. There must be something in the Opera code that doesn't use the power states of cpu correctly and attempts to run at maximum frequency with no load or to decrease latency or ... something... maybe missed "power target window" for CPU return to Idle power state. Or, possibly Opera tries to conform to Windows 10 new turbo-ing modes and balanced profiles. It is happening with other apps and also newer laptops unfortunately. Sorry for all the tech speak but hopefully an Opera Developer could chime in.

I have tried:

Disabling hardware acceleration and toggling advanced settings like javascript.
Applying different display drivers
The Opera task manager shows priorty cpu usage on display driver (like 3%), but doesn't match the 100% usage on Task manager
IDLE disable CPU power management is being turned off for sure because I can see it toggle.
no live wallpaper or weird addons active in Opera, animations turned off.

Happens with Edge browser too but after about 45 second delay. So different behavior but same result.
Doesn't happen with Chrome or Firefox

Any luck on this? I have the same exact problem.

I am still using tab utilies add-on with Firefox ver 28 with tab stacking just because I must have tab stacking like when I used to use Opera. I love opera's focus for always focusing on speed and off the shelf usefulness. Please bring this tab stacking feature back. I suspect the the switch from presto to webkit engine is preventing this. Any thoughts?