When I go to gmail and send an email, it autopopulates the subject line. For example, I type in "hi" and it fills in with a drop down for "hi", "hi Fred", "hi George", etc. . . . because those were previous subject lines. I want to delete this, since others may be using my computer and I don't want them to see these subject lines. It seems to auto-populate the subject lines even from different gmail addresses. It is saved in Firefox because when I use a different browser this does not happen.