User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1) Gecko/20061010 Firefox/2.0 Uninstalling an extension will not delete configuration values created by the extension. Reproducible: Always Steps to Reproduce: 1. Install an extension (I installed flashgot https://addons.mozilla.org/firefox/220/) 2. Uninstall the extension Actual Results: In your url bar goto about:config notice that values from the extension are still there Expected Results: Uninstall should remove all traces of the extension from the config file

*** This bug has been marked as a duplicate of 258301 ***