I used windows 7 sp1 64bit. i used firefox portable 8.0.1. right click portable firefox, i see the jump list (task), but that broken icons. and i click the task, that show me an 'error'. i test Google Chrome Portable the jumplist(task) it works.
and installation firefox 8.0.1 also jumplist(task) also works. so, i think that a bugs. please test and fix. thanks.
also, i used firefox plugin call downthemall. that a download manager, when start download has a 'owner windows pop up'.
when I closed portable firefox. the downthemall windows not auto close. and when I open againthe portable firefox , the last time home page, all missing. also reminder fox or other has 'owner windows firefox plugin' has same problems. please test and fix too.