You Deleted Your Cookies? Think Again (via) Flash cookies last longer than browser cookies and are harder to delete. Some services are sneakily “respawning” their cookies—if you clear the regular tracking cookie it will be reinstated from the Flash data next time you visit a page.
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At least for Linux users, emptying the folders .adobe and .macromedia seems to work as a means of preventing Flash from writing these cookies permanently anywhere.
Sure, it means that none of your flash apps can have persistence, but I've seen no ill effects of this on the sites where I actually care about flash working (Video sites only, really)
@Arve: As the article points out, flash does provide an interface for deleting the contents of those folders, albeit via a confusing flash applet on adobe's site. Also if you set allowed storage to None on the Global Storage Settings page of that applet, it sounds like it should stop it from saving cookies for any sites not already listed under the website storage settings.
There's also the Better Privacy Firefox add-on which can allow you to set which site's "LSO"s should be kept and which deleted when you close your browser.
Anonymous - 18th August 2009 00:50 - #