Linux opera browser crashes on Debian-based systems whenever youtube videos or some other media are started to play.

Opera browser version: 79.0.4143.22
Debian 10 (with latest updates installed)
Ubuntu 20.04 (with latest updates installed)

There appear (graphic/video) glitches/artifacts in opera browser like never before - since version 71.0.3770.148

OS: Debian 64 bit
CPU: Athlon (2006 year)
Chipset/Video: nForce 430 / GeForce 6150SE (2005 year)

@jimunderscorep

The menu works both with a mouse click and Alt key on the machine with Ubuntu 18.04, but unfortunately it doesn't work at all on the machine with Ubuntu 16.04 (actually there is no O-menu there at all) - i don't know what makes that difference between the two Ubuntu installations (other apps also work differently on the two ubuntu computers) ?

As far as i can remember, the menu had worked before on 16.04 - it has stopped working since some previous version of Opera that i can't remember now.

same with 102.0.4880.56

@merlo1711
Try:
opera --force-device-scale-factor=x
where x can be a real number such as: 0, 0.5, 1, 1.7 etc.

@anindyasundarbhar
May this work for you too:
https://forums.opera.com/topic/42185/the-videos-don-t-play-topic/155?_=1694690044973

102.0.4880.51 also doesn't work for me.

@merlo1711
I found this link (as related to your issue):
https://forums.opera.com/topic/5343/faq-opera-s-whole-interface-is-too-big-how-do-i-fix-it

@merlo1711
Do you experience a bigger UI of other apps? - for example compare VLC to a KDE player. The UI of VLC and other apps is bigger than of others on my system - in some cases –– too big. I am also with a Qt-based desktop environment and Nvidia adapter with a proprietary driver (debian).

Upgrading to opera-stable 102.0.4880.46 is not yet resolving the issue.

@superflixla
Try these different versions of libffmpeg.so until opera start opening on your system:

https://github.com/nwjs-ffmpeg-prebuilt/nwjs-ffmpeg-prebuilt/releases

https://repo.herecura.eu/herecura/x86_64/

https://launchpad.net/~savoury1/+archive/ubuntu/chromium

In case you don't know how, find opera folder in /usr/ folder (with the command: find /usr/ -depth -maxdepth 10 -iname 'opera') and copy libffmpeg.so in it (that file should already be in that folder).

@merlo1711
What is your desktop environment (gnome, mate, kde, xcfe, lxde, cinnamon, deepin or antoher), your graphics card/adapter and the graphics driver you use?

@myswtest
The other chromium-based browsers work properly on the same configuration. Plus, opera browser had also worked properly for years on Debian/LXQt devices at my work until the moment when it was upgraded to version 102 few weeks ago. That is why i am not inclined to think that the issue comes from Debian distribution.