Firefox supports OpenSearch, you can just go to any search engine (like my searxng site) and right-click the address bar to add it to your search engines.
Or you can manually add it from settings by just adding the address of the search site.
It will determine the proper format automatically, no need to add the %s stuff you typically would.
Firefox also handles suggestions properly, Chrome doesn't seem to support them at all outside of their engine.
The problem is not whether or not the site supported open search, the problem is that Firefox should have allowed me to easily and intuitively set a custom search engine. When I go into Google Chrome and want to set a search engine, I can easily figure it out. Having to change an about:config flag is not at all intuitive.
For the record, I was trying to save my bookmarklet URL from DuckDuckGo and the open search functionality wasn’t working to save my bookmarklet query string.
I pay for Kagi because it does not have any form of advertising or “sponsored results”, and it consistently gives me the best results of any other browser I’ve tried.
Apple supporting this would not be hard, as with all the other search engines the search is just a query parameter appended to the url, they could just provide a template string for “unsupported” search engines.
they could just provide a template string for “unsupported” search engines.
Like everyone else does.
Apple isn't not supporting it because doing so would be hard, it's just another way to maintain control over their walled garden and make a profit selling exclusivity.