Yahoo toolbar version (1.5.2.20080717) we offering is not compatible with the latest available FF version (3.5.2).
After installation you can not find YTB in browser (to see it, you need to update it to new version YTB 1.6.5.200812101546 by "Update" click). I guess we need to update our existing YTB version to the latest one. Screenshots attached.

Steps:
- install jre-6u16-s.exe build 01 (FF default browser)
- after installation YTB is not presented