According to the comment above, added functionality that’s not present in the original like adult sites. It was based off Tachy and now just moved to Mihon as the base.

Try using the Mycroft Project that the page mentioned, it’s got user maintained search engine plugins.

I’m not sure which build of firefox the other user is using, but in the stable stock build I can’t add it in settings page itself either.

But if you go to a website that can do search, eg. Startpage, then right click on the browser’s url bar again, a new option to add the search engine pops up at the end of the context menu.

Another alternative is installing addons that adds the search engine too, I believe duckduckgo & Startpage has theirs.

Here’s firefox’s docs about it - it’s got screenshots of how it looks.

Edit: Ah, I see you’ve tried it already - probably plugins are the next easiest way to go about it then :( The docs do give a direction though of where to go, like repositories of supported sites.

There are much easier trackers to get into that doesn’t require this much prereading prior.

Private trackers (not the biggest ones though) do open signups from time to time too (ie no interview no vetting, just sign up), so look out for those.

The most important thing is if you’re into the content offered on the site - RED’s only attractive if you’re an audiophile for instance, it doesn’t have movies/games etc. Get a name, then find out from there how to get into it. Read the rules on how not to get into leecher status almost immediately once you get in. Once you get your foot into an easier tracker that at least has some content you’re into, then make your way up if you want more.