Someone was asking me the other day how to get rid of their Persona in Firefox once they have applied one. In my opinion they are very distracting and so I never use one.
Remove Firefox Persona
Follow the instructions below to remove your persona and go back to your original configuration.
Click on the Firefox button and then click on “Add-ons.”
On the left hand side, select “Appearance.” And then on the “Default” theme, click enable.
Step 3 – Optional
If you want to completely remove the other persona, just click on “Remove.”