Web Player for Spotify™ extension - Plugiciels Opera

Wrapper window for Spotify's web-player with easy access toggle, next and previous buttons

Media Player extension - Opera add-ons

Custom Spotify web modding for Opera GX

Spotify Web Player

Custom Spotify web modding for Opera GX

How To Add Spotify To Sidebar In Opera Gx (Tutorial)

Spotify Player

How to Use Spotify Web Player

Opera adds a music player and shopping center to the sidebar

Opera GX integrates Music Player with Spotify, Apple Music and Music in the sidebar - Blog