About a year or two ago I signed up for a free account. Once signed in I was able to search titles and play music from my browsers window. (FireFox)
Then something changed and they wanted me to download and install some software package in order to play music. I refused!
After that I accidental found a way to play a score on Spotify by doing a Google search. (Score Title + Spotify)
Now if I go directly to Spotify and sign in it only takes me to my account page. There's no way to search and play music. Going to the home page offers no options either.
The only way I've been able to find and play music on Spotify is by doing the Google search I mentioned above. But that doesn't always give me results either and it's time consuming.
The URL you gave lets me search the site. What ever URL I was signing in with only gave me my account info.