Whenever a new opera version is availabe I do a fast check on a dutch website npo.nl, to see whether live streaming and watching old programs work. On Ubuntu 18.04 all works fine in combination with chromium-codecs-ffmpeg-extra.
Ubuntu 18.04 :
Ubuntu 20.04 :
opera-stable_73.0.3856.344_amd64.deb (same version)
On Ubuntu 20.04 the DRM protected video content refuses to stream and or play.
Any tips how to get the newest opera to work properly on the most recent LTS edition of Ubuntu ?
Default for what? There is a default font for web pages, though most sites specify their own font instead of using the default. Opera's menus and address bar should use the font your environment suggests - you haven't said what desktop you use.