When listening to Spotify on my phone I keep getting disrupted by Another Device

[musicstreamr824]

Plan

Premium

Country

 United States of America 

Device

(LG K20 V)

Operating System

(Andriod Version 7.0)

My Question or Issue

 When attempting to listen to music on my phone, or on my desktop I keep having my listening experience interrupted by a message saying (You are listening on Web Player [Firefox]) and it gives me an option to "Continue" or "Listen On This Phone and or Computer". I do not recognize any of the music the app is playing at random nor do I know what device it says that it is playing it from. 

When I am logged in on my desktop it says it it is playing from a random computer Webplayer (Firefox). And now when going to listen music on my phone it will not allow me to do so without interrupting a bunch of times playing other random music I have not selected or stored to any playlists. 

I have been subscribed to Spotify for a long time and haven't had any problems and very much enjoy the ad free service, but this problem is very irritating. Please help, or I am going to have to cancel my subscription. 

Also, I have l logged into my account on the Spotify website and "logged out everywhere" but it did not solve the problem. I have a laptop that I have Spotify installed on, but after turning it off, the Spotify app is saying some other device or Web Player is auto playing music. 

[musicstreamr824 · Accepted solution]

I found the solution, I think my account may have been accessed by an unknown computer which was continually playing music and overriding me using my account. 

I logged into my account through Spotify's website, "logged out of all devices" found in my account page, and reset my password using the Spotify password reset web page (found via a search engine). I can now listen to music without the unknown device interrupting my music streaming experience.