I use Maxa Cookie Manager to automatically manage and control web bugs and cookies . Since Firefox v35 came out Maxa Cookie Manager keeps giving me error messages that state 'due to unexpected behavior on the part of Firefox Cookie Manager is unable to delete cookies from it. I now have to periodically shut down Firefox and manually start a scan with Cookie Manager so that it can delete all the @#$% that websites leave on my PC that are not on it's white list. I'm getting tired of doing this and will be starting to look for another web browser that will play nice with Cookie Manager.