How do I remove the user ID, which is already stored in firefox window? For example, whenever I start to type my Yahoo ID to open my Yahoo mail box, a drop-out box is appearing and my ID is visible there.

Hi, You can try to delete individual entries by double clicking inside the box and when the drop down entries appear, use the arrow keys to highlight the relevant ones and press the '''Del''' (Delete) key on the keyboard. [https://support.mozilla.org/en-US/kb/Form-autocomplete?s=auto+complete&r=0&e=sph&as=s Form Autocomplete] To delete all such entries in all the web pages, press '''Ctrl''' + '''Shift''' + '''Del''' or '''Tools''' ('''Alt''' + '''T''') > '''Clear Recent History''', choose '''Everything''' in '''Time range to clear''' and '''Form & Search History''' under '''Details'''. [https://support.mozilla.org/en-US/kb/Clear%20Recent%20History Clear Recent History]

Hi Vivek, Greetings! It's done.. Thanks for your help.. Regards.