When I setup a new browser, I always delete all the default search engines and install DuckDuckGo, Ecosia, Qwant and Startpage. If I’m looking for accurate results, I always use 2 or 3 of these. I can’t say I consistently get better results using one or the other.

If you want to lurk Reddit without being tracked, please use Teddit.net, they won’t complain about using a mobile browser.

Cat 5e supports 5 and 10GbE at least for 10 meters. I wouldn’t bet on it considering the price of Cat 6a but 2 meters is really short.

Iperf is the standard for measuring speeds between devices, remote OR local. Can you be more specific about what you mean by “This”?

First and foremost, the user that adviced you to look at the connection speed is 100% right. If you establish a gigabit link with a gigabit device, it makes no sense to upgrade other than future proofing.

There’s no point in going beyond Cat 6a. Keep in mind that the length of the cable is a big factor as well. For 1/2.5GbE, Cat 5e is plenty (for at least 100m). If you plan on going to 5/10GbE now or in the near future, Cat 6a will get you there with ease (for at least 100m). In both cases, keep the cable as close to the required length as possible + a 30cm/1ft service loop (slack) on each end. That will cause no more signal degradation then necessary and make for a clean install.