The Mac app alfred.app has some pretty neat features. One of them called "Quick-Search the web" (see more here) allows to search the web by typing a keyword (i.e twitter) and getting a web page directly (i.e https://twitter.com).
But even better, it allows the user to pass a query string so that you get the page you need without any time lost. For instance, you could define https://twitter.com/{query} and type "twitter StackExchange" in your Alfred launcher and it would then bring you directly to https://twitter.com/StackExchange
Basically, I'm dying to find a way to do that (especially the latter with the query string) on Ubuntu.
Is there any way to achieve something similar? Tried Synapse and Gnome Do but they don't offer such flexibility. Autokey might possibly offer this but certainly not out of the box but via Python scripting only (I guess).