nplansweepershellexec.dll extension broken in Firefox 21.0

[cecole1]

After upgrading to Firefox 21.0 I found none of the basic or advanced actions would run (as a result of a plugin error).

I re-downloaded the plugin and tried to install it, but all I got was the error: "This add-on could not be installed because it appears to be corrupt."

I will use Internet Explorer 10 in the meantime.

[cecole1]

My issue was resolved by the Lansweeper Support team.

You can install the plugin by browsing to the following link in Firefox.
http://www.lansweeper.com/firefox/nplansweepershellexec.xpi

[Hemoco]

Could you please screenshots of the error you get to support@lansweeper.com

[cecole1]

File is 137 KB (140,800 bytes).

MD5 hash is e2b21ab1e726ddcd9a0af7c5cc196c98.

[Hemoco]

We cannot reproduce this problem. Could you ensure that the DLL file is complete. It should be 137 KB: http://lansweeper.com/kb/11/firefoxplugin.html