On a new computer or browser install where I am the primary user, I usually set my browser up to use 0MB cache and to delete history on exit. I'm not specifical

On a new computer or browser install where I am the primary user, I usually set my browser up to use 0MB cache and to delete history on exit. I'm not specifically trying to hide anything, but I don't want to be in a situation where my cache or history is used to make judgements about me. Would this be construed as obstruction of justice if I had also known the bombers?