Why others can use my account to login the browser?
The old PC which I used and uninstalled. (I also disconnected this PC at the account manager.)But others use this and install the firefox again. They didnot need to login my account. When the firefox install and login automatically. Everything of my password and bookmark have been share as well.
Chosen solution
Shut down the old sync. Then create a new account.
Resetting the sync password, or changing its e-mail, will remove all data from the servers.
The data in your profiles will not be affected.
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Note: Firefox comes in three or more folders on all computers. They are;
Maintenance: (Programs Folder) <Windows Only>
Firefox itself: (Programs Folder)
And two folders in the profile of each user on the computer
for each Firefox profile for that user.
If you remove the Firefox folder, the user profiles would not be affected.
If you are getting rid of a computer, you should first totaly delete your user folder.
Chosen Solution
Shut down the old sync. Then create a new account.
Resetting the sync password, or changing its e-mail, will remove all data from the servers.
The data in your profiles will not be affected.