As a forensic investigator, you are likely already familiar with the artifacts left in storage on a disk from the use of a web browser. The mainstream browsers all provide, for the most part, the same functionality of things like tabbed browsing, remembering history and exposing it in date ranges, storing bookmarks for later viewing, etc.
One of those features is the topic of this blog post: remembering data that a user typed into a form field so that same value doesn’t have to be typed into that same form next time. This is generally referred to as an autofill form values feature. Firefox, Chrome, Internet Explorer, Safari, they all offer this feature, but each of them store these values in a different way.