User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:126.96.36.199) Gecko/20110218 Firefox/3.6.14 Build Identifier: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:188.8.131.52) Gecko/20110218 Firefox/3.6.14 Error Firefox could not install the file at https://addons,mozilla.org/firfox/downloads/latest/122/addon-122-latest.jar?src=search because: Unexpected installation error Review the error console log for more details. -203 Reproducible: Always Steps to Reproduce: 1.installation of add-ons 2. 3. Actual Results: Since new upgrade this morning, lost all add-on functionality Apparently the upgrade is addressing a wrong locations for add-ons.
Could you see if the issue occurs with a new, empty profile: http://support.mozilla.com/en-US/kb/Basic%20Troubleshooting#w_make-a-new-profile
Reporter, Does this happen with Firefox 4 and updated addons in a fresh profile?
It also sounds also like the addons if showing are no longer compatible or disabled in the Addon Manager.
Thanks for the bug report. This particular bug has already been reported into our bug tracking system, but please feel free to report any further bugs you find.