Are you referring to the ability to switch between gmail accounts by clicking your profile image in the upper right hand corner of the screen? If you click that icon and then select "sign-out" it should bring you back to https://accounts.google.com where you can choose to remove the accounts you wish:

No these accounts are linked so when an email comes to one it goes to all three . Deleting is process in reverse. Please help.

Hi

This does not sound like an issue with Firefox for Android, but is something that the Gmail support team should be able help you with.

I must tell you I accomplished this linking through the Firefox app. All mail from one was downloaded to another and another . This was a function of Firefox. It seems as if ZGoogle would have an answer . Agreed . Ty

Hi

Firefox for Android is not an email client and does not have any functionality to manage email addresses aside from opening and managing email as you would in any web browser.

I strongly recommend that you speak to the Gmail support team about this issue.

I have IOS btw

Hi

Apologies, but you have been asking about this issue in the Firefox for Android support forum.

Irrespective of the operating system of your device, the team at Gmail should be able to help you.