Previously I used Chromium/Google Search as my browser/search engine combo. When I did that I could type the following into the address bar to limit my search to a specific site:

```
site:www.example.com searchterm

```

Now I am using Firefox/DuckDuckGo instead. When I type the same command into the address bar I get this error:

> 
> Problem loading page
> 
> 
> The address wasn't understood
> 
> 
> Firefox doesn't know how to open this address, because the protocol (site) isn't associated with any program.
> 
> 
> You might need to install other software to open this address.
> 
> 
> 

If I type the `site:...` command into DuckDuckGo directly, it works. How can I make Firefox recognise the `site:` prefix as a command, OR what is the equivalent command in Firefox?

(I would strongly prefer to use the address bar rather than the search bar.)