User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1) Gecko/20090624 Firefox/3.5 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1) Gecko/20090624 Firefox/3.5 The default download location preference was changed (from desktop to /some/giant/path/downloads) when I upgraded to 3.5 . I was upgrading from whichever 3.n version came before 3.5. Since this is a incremental upgrade, and not a full version number upgrade, and my other prefs appear to be unchanged, it is at least unexpected behavior, if not an outright bug... Reproducible: Didn't try
Mozilla/5.0 (Windows NT 5.1; rv:21.0) Gecko/20130219 Firefox/21.0 Build ID: 20130219031055 Works fine for me when updating Firefox Nightly 19 to the latest one - the set download location is not changed after update. Setting the status of this bug to Resolved Worksforme - if you are still experiencing this problem or have more information to provide feel free to reopen the issue.