SOLVED !!! Unfortunately, today, automatic update got error "CAN'T LOAD XPCOM" and then I performed Firefox reinstall exactly as indicated by Kobe 26/09/13, 05:40 at https://support.mozilla.org/it/questions/972465 but at the end o process all my firefox bookmarks links are LOST ! I still have original Firefox installation folder (that was in C:\Program Files (x86)\Mozilla Firefox) in the Recycle Bin .... Is it possible to recover and restore original PROFILE FOLDER ??? any hint ? thanks and regards ! Rudy Then I looked for and found pages related to PROFILE FOLDER and how to restore the auto saved bookmarks "folder" .... so I was able to recover my Profile and overcome my worries !