Live HTTP Headers

Z 5 z 5 hwěžkow pohódnoćeny

wot codk dnja Now. 15, 2009 · trajny wotkaz

Love this addon, but after i've updated my OS to Win 7 i can't seem to install this addon.

Hope somebody can help me, error message:
Firefox could not install the file at

https://addons.mozilla.org/en-US/firefox/downloads/latest/3829/addon-3829-latest.xpi?src=addondetail

because: Unexpected installation error
Review the Error Console log for more details.
-203