Some browsers may try to fill in form fields for you, depending on how they are configured. Specifically when editing the user profile - password page of various users, it may be filling your username or password into the fields. Though the page is already programmed not to do this, some browsers may still fill in these fields. To prevent this, you can turn off Auto-complete in your browser settings.
Go to Settings, autofill and turn off the password autofill mode
In Internet Explorer...
Try going to Internet Options, which can be found in the Tools menu. Then go to the Content tab. In the Autocomplete section, click the Settings button. Then try un-checking ‘Forms’ and ‘User names and passwords on forms’. After saving the settings, you may need to close and re-open the browser to get the new behavior – not sure.
For Safari go to Safari | Preferences | Autofill. Then click Edit for Usernames / passwords. Removing it will drop it.
Firefox instructions (from one of our users)...
DELETING INDIVIDUAL FORM ENTRIES:
If you want to remove one of your previous form entries from Firefox's history:
* Click on the form field and press the ↓ key to display all the saved entries. You may type the first few letters of the entry to limit the number of entries displayed.
* Use the ↓ key or the mouse pointer to highlight the entry you wish to delete.
* Press Shift+Delete. The entry will be removed.
Repeat the process for each entry that you'd like to delete.
CLEARING FORM HISTORY
If you want Firefox to forget all of your previous form entries:
Click on the menu button New Fx Menu .
Click History, and then Clear Recent History….
In the Time Range to clear: drop-down, choose Everything.
Click on the arrow next to Details to display the list of items that you can clear.
Make sure Form & Search History has a check mark next to it.
Click Clear Now to clear your form history and close the dialog box