Arch Linux's uname --all output : Linux ladyluck 5.0.5-arch1-1-ARCH #1 SMP PREEMPT Wed Mar 27 17:53:10 UTC 2019 x86_64 GNU/Linux
Opera 58.0.3135.127 installed from the Arch Community repo : https://www.archlinux.org/packages/community/x86_64/opera/
See screenshot below. This is the standard installation of Opera. Nothing has been customised by me. I hardly use Opera as a regular user. Only to test website layouts and code. But today I had to use it as a regular user because Chrome is instable on KDE PLasma, and Firefox has an issue with black input boxes with nearly black text. What can I do to resolve this issue?