For the simple reason that the Sxipper is not supported on Firefox 4. Also, note that the Sxipper has been removed from the Firefox Addon page (you can't find it anywhere on Mozilla Firefox Addons web page).

I'm not sure if there would be a newer version of this wonderful plugin anymore - the latest release was done about an year back!

May be if all users signup here, something might happen - http://www.sxipper.com/sxipper3

An alternative to Sxipper maybe an addon called lastpass which is also free. I just did a cursory glance at Sxipper website and its function and I am sure lastpass can fullfill all or most of them.

https://addons.mozilla.org/en-US/firefox/addon/lastpass-password-manager/

If that is not to your liking, ou can also force Sxipper compatibility with Firefox 4, but that is not recommended.

LastPass is what I'm using currently, all the way through Firefox 4 Beta. Though I'm quite uncomfortable in storing my passwords on some server.

Thanks to all replies...I downgraded firefox back to v 3.x to continue using sxipper....it is an integral part of my daily use. thanks all

I have just received notification that Sxipper will cease operations and they suggest to migrate. There willnot be a version for Firefox 4

Xlalig... you've caught my attention---"can also force Sxipper compatibility with Firefox 4, but that is not recommended. " i love to crash and burn" ...

care to show me the force...???

I have upgraded to firefox 4 and migrated to lastpass...all seems to be OK so far...thanks for all the help guys