Best posts made by ogrfnkl

@donq Yep, that was it! The problem was caused by an extension: Text to Speech (TTS) by mornicolhkher. I uninstalled it and everything is back to normal. Thanks, @donq and everyone else who replied, for your help!

@burnout426 Yes, I did, and also, when uninstalling, I was directed to a survey where I logged the bug for the developer's eyes only.

@burnout426 Thanks for doing the test on your computer and replying. Sounds like this may be issue specific to my Opera installation. I am at a loss, though, as to what may be causing it. My Opera version is the same as yours now (76.0.4017.123), and the problem is still there.

One interesting detail is that I can select and drag static text on any internal Opera settings page, such as, for instance, the About page, but not on regular websites.

Any suggestions for what I can do to further diagnose or resolve this issue?