Sadly, the process isnt as simple as uninstalling an extension or toggling a checkbox in prefs.
Heres how:
throw in about:config in the browsers address bar and hit the enter-key afterwards.
Confirm that you will be careful if the prompt appears.
Search for web client.pocket.enabled.
Double-punch the preference to toggle its state from true to false.
How to disable Pocket in Firefox| Ghacks
