That's the reason why we see how many add-ons are appearing to complement this amazing program.
One of those complements is Spotify Search, and add-on for Firefox that allows you to search for any song or artist in Spotify from the browser just selecting any word in a website.
It's easy to use. You only have to select the name or title of the song you find in any website, right click it and choose the option in the menu (search for Artist, song or album).
You need to have spotify installed on your system.