Ever since the new update firefox 4.01 it won't start, or when it does it freezes and crashes - I tried uninstalling and reinstalling, restarting the computer. I lost all my bookmarks when I uninstalled in hasted and didn't back them up

Question

Please see above, but I can;t get firefox to open

Answer 1

I think the problem is that the iPod got set to Manually manage music and videos.  It needs to be set up for automatic syncing again.  Just unchecking that Manually manage music and videos setting does not do it.
In iTunes 12, select the iPod in iTunes (using the device button), so that you see the iPod's "management" screen.  In the sidebar (along left side of screen), there are two headings (Settings and On My Device).  Under Settings, click on Music.  To the right, you see the iPod's Music screen, where you tell iTunes how to sync songs to the iPod.
Check the box at the top for Sync Music.  That turns ON automatic syncing for music.  Below that, choose the option to sync Entire music library (assuming your music library fits completely on your iPod).  Otherwise, you can choose the option to sync Selected playlists, artists, albums, and genres and make your selections below.  Then click Apply.