Rated 5 out of 5 stars

The link of HS2 is updated
https://addons.mozilla.org/addon/history-submenus-2/

History Submenus Ⅱ for Firefox 4.0 - 9.0 Rated 5 out of 5 stars

History Submenus Ⅱ for Firefox 4.0 - 9.0.
https://addons.mozilla.org/addon/history-submenus-2/

Everybody who is using Personal Menu please update it to 5.0.6, thanks.
https://addons.mozilla.org/addon/personal-menu/versions/5.0.6

Here is the version for Firefox 4 Rated 5 out of 5 stars

Here is the fixed version for Firefox 4:
http://forums.mozillazine.org/viewtopic.php?p=10609715&sid=49fd02453c9a85d478e8aa67115314ed#p10609715
I've used it for a long time and love it so much. I'm not sure what happened but the developer used to be hard-working. Keep going, man! : )