If you already have a Spotify account, click on the "Log in" button at the top right corner and enter your credentials.
If you don't have an account, click on "Sign up" and follow the prompts to create a new account. You can sign up using your email, Google, or Facebook account.
Ensure that DRM-protected content is allowed in your browser settings (e.g., in Firefox, go to Settings > Privacy & Security > DRM Content and check the box).
By following these steps, you can effectively access and use the Spotify web player to enjoy your favorite music and playlists directly from your web browser.