I finally got bits and pieces together and made a boring test video of Volumio’s UI performance on different browsers. I use Volumio since 2019 and have noticed quite huge performance difference based on browser in use - especially big difference in albums list. Based on my experience and now on my experiments, Gecko based browsers does much better job. Of course during recording there is performance penalty introduced by screen recording, still it didn’t influence result that much.
What kind of experience others have? Have others noticed similar performance difference?