Browse cache can bloat up with time consuming valuable space on the laptop. On one laptop me and tch checked, there were 400MB of unaccessible files (mostly multimedia) in the Browse instance folder. We need a procedure to clean instance/ when starting browse (needs to check it is the only instance to avoid corner case of more than one browse instance). Another option is to check the date of partial files... Ticket: http://bugs.sugarlabs.org/ticket/2659#comment:6 Relevant code: https://github.com/sugarlabs/browse-activity