Yes, first thing I set up is all the integrations (additions).
Also yes, hardware acceleration is on for the virtual machine itself.
It's important to note that all other browsers run fine, only opera has the issue. Opera did not have an issue until version 103. Since 103 I have to either turn off acceleration for the whole machine, or disable acceleration in Opera in order to launch the browser at all.
Fully 3d enabled sites will crash browsers in virtualbox, the vast majority of sites are not an issue. Opera has I can only guess, made it so that the browser itself now launches as fully 3d and thus instantly crashes. I tried turning off acceleration for the whole machine so I could launch the browser again and turned off like every option and it still would crash as soon as I turn acceleration back on. I have no idea why exactly it does it or if anything can be done. I also reached out to support weeks ago and heard nothing back.