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.
At least for me, to manually add the search engine, I had to follow this superuser answer to be able to add the custom search engine.
Maybe the search engine you were trying to add doesn’t support OpenSearch?
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.
Oh yeah I see what you mean now, that is dumb.
I didn’t realize they removed the ability to manually add a search engine (without flipping flags)