I use a common Firefox folder (situated in a FAT32 Windows partition) for running Firefox on my laptop in both Linux and WIndows. All Firefox extensions, bookmarks etc work perfectly EXCEPT for the Zotero attachments (links to files and stored copies of files). I have to duplicate all stored files and links for viewing in either Windows or Linux. In fact I see both copies of the saved files in the Zotero storage directory, in two different directories with different numerical names e.g. 3079 and 5842. All the rest of Zotero works in both Linux and WIndows.