Open your computer user account and delete whatever needs deleting.

Hi FredMcD the issue is how can I do that if the computer is not with me. The problem statement here is how can I delete the stored Login/Passwords, Bookmarks etc on my Firefox account remotely and should get back once we login back. Hope this explains the situation.

If the device is not being used and you also can't access Firefox or its profile folder then there is nothing you can do.

Logins are stored in logins.json in the Firefox profile folder.

• https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data
• https://support.mozilla.org/en-US/kb/password-manager-remember-delete-edit-logins