Out of all the popular browsers, Opera leaves behind the least amount of useful information for investigators. Not only is the data stored in plain text format, but it does not record every URL visited, only the latest one. Therefore it is impossible to tell how often someone has visited a particular website. Even when viewing web history from within the browser only the latest entries are shown, giving a false impression of the actual history. For example if someone went to exactly the same websites two days in a row, the first day would have no history associated with it, since each entry would be overridden by the latest visit.
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