You’re not referring to this satire article by chance?

You use Steam for games on Linux primarily. Independent native games exist as well. Many Windows-only titles will be best run through Proton: Valve’s modified WINE bundle. Other store titles can be configured to run through WINE or Proton via apps like Lutris or Heroic (GOG, Itch.io, Epic Games, etc.).

For multi-monitor: use Wayland. For 2.5Gbps Ethernet NICs, they never work properly on any system in regard to performance, but I presume you are referencing the subpar Realtek NICs not connecting? Depending on the distro, you likely won’t have the driver and/or firmware package preinstalled to make it work.

https://librewolf.net/

A summary from its site and known technical details:

• no telemetry by default
• includes uBlock Origin
• has sane privacy-respecting defaults
• prepackages arkenfox user.js
• relatively well-maintained fork of Firefox that keeps up with upstream
• No major controversies AFAIK

As for Windows 7, nobody should really need to install Librewolf anyway on such a device. No device running Windows 7 should have access to the internet at this point. If you are asking about compatibility intending this use case, you have bigger problems to worry about than your choice of browser. If you just need to view HTML files graphically, even Internet Explorer or an older firefox ESR will do.