Not all websites publish OpenSearch information, however. If there's a site doesn't, search for it on Mycroft Project. Source: over 1 year ago

Use https://mycroftproject.com/ for find the search engine that you want, click at the tab corner and you will see ``add (name of the engine´´ and you will get it. Source: over 1 year ago

And then go to https://mycroftproject.com/ , search for that instance and just click in ``add´´. Source: over 1 year ago

I've been using Mycroft Project to customize my search engine options. Source: over 1 year ago

I am facing a similar problem and I found this post. I found this from Firefox's support docs: https://mycroftproject.com/. Source: over 1 year ago

Firefox detected a potential security threat and did not continue to chesstempo.com because this website requires a secure connection. Source: 8 months ago

I enthusiastically recommend Chess Tempo (https://chesstempo.com/), which will give you interactive chess puzzles from real games that are tailored to your level. Someone else mentioned the similar system on lichess, which is also fine. - Source: Hacker News / 8 months ago

Does anybody know? There was a post from two years ago about this, and someone commented chesstempo.com, but I can't find the same board there. Source: 10 months ago

I use chess.com to play and I also have an chesstempo.com account which seems to be really good for practicing the openings. Source: 11 months ago

To get better at #2 pattern recognition, work on fast tactics. Go to chesstempo.com and train with blitz/easy tactics. Do this every day. After a time, I think you won’t need to do the Fritz training (maybe a month or two and you should be good), but do the tactics everyday. It’s your daily vitamin. Source: 11 months ago