hello rodale, what you're seeing is probably a side effect of firefox not being able to save certain preferences into its profile folder. go to ''firefox > help > troubleshooting information'', click on ''profile folder/show folder'' and close all firefox windows afterwards. a windows explorer window should open up - in there delete the file named '''user.js'''. in case this didn't solve the issue yet please also refer to [[How to fix preferences that won't save]].