Hi Team Im working on my Macbook running OS X 10.5.8. Since I can remember I have been using Thunderbird & Firefox as my stock Mail Client & Browser. I had some problems with my Firefox browser so decided to remove the Application Files and re-install. I can install Firefox without issue but when I open it up a "Alert" box pops up stating... ''Could not initialize the application's security component. The most likely cause is problems with files in your application's profile directory. Please check that this directory has no read/write restrictions and your hard disk is not full or close to full. It is recommended that you exit the application and fix the problem. If you continue to use this session, you might see incorrect application behaviour when accessing security features.'' I click okay and Firefox starts but I cannot access any pages. I try to start in "Safe Mode" but again nothing seems to work. So again I figure remove or "Move to Trash" all the Application Files but I am unable to remove all files because I get the following errors from the trash can for these files... "The operation cannot be completed because the item "libsmime3dylib" is in use." The same error pops for these files too... "libplds4.dylib" "libplc4.dylib" "libnssutil3.dylib" "libnss3.dylib" "libbspr4.dylib" I try and search in Spotlight for these files no no results are returned. I hope I have provided enough information for you to investigate & help. Keep up the good work. All the best, Kriss