Add Presearch as a Search Engine (Chrome & Safari)

In Chrome, just add (and make it Default):

In Safari it is a little bit different. By default, Safari only has 4 search engine (you can see in the Preferences / Search tab) but you can not add a new one.  

The solution is add an extension to do that: Omnikey ( Once you install it, you just add:{search}

And just like that, your next search (a preSearch) add “PRE” to your virtual currency.