These are a SearXNG instance, I think they’re aware of those facts there. You can set it up to not search or search on specific pages, you can also have multiple profiles which is useful when searching for different things. It also combines multiple web search engines… I haven’t dived into the configuration that much because what’s most important to me is that it doesn’t show ads, but I assume it’s easier to install the extension, although you don’t set this up every day.