In mid-2020, Google removed the Classic Layout from YouTube forcing us to use a bloated polymer-based layout.

If you have a gamer pc with linux installed and Chrome you will not have a major problem. But the new YouTube layout made with polymer consumes a lot of resources, it is very slow and bloated if you do not use a browser based on Chrome, not to mention on an old PC.

We do not intend it to be the default view, but for performance and compatibility reasons, include it again as an option, since in Firefox it is very slow and contains many errors such as BUGS.