Doesn’t have to mean much at all: https://librewolf.net/docs/faq/#im-getting-sec_error_ocsp_server_error-what-can-i-do

Since I also get these from time to time with similar setups, I usually just switch browsers temporarily (after some time it will probably work again). Since my setup uses 3 browsers regularly, it’s no big deal for me. It also rarely occurs so it’s only very mildly annoying. As usual, with a more secure setup you will automatically get a couple of usability issues as well. Can’t change that, it’s like a law of physics. If it annoys you too much, you have to disable this security feature in the browser settings.

In Nethack, you can fully complete the game as a pacifist, although it’s VERY hard and the game is already hard to get into to begin with. In that case, you are only allowed to indirectly kill enemies by having your pet(s) kill them or by using spells which make enemies attack themselves. Or simply by avoiding enemies completely. Playing as a healer or wizard is the easiest option, but still very hard. The game rewards this and other conducts (= supported “challenges”) by mentioning it in the very end after you’ve ascended.