window buttons in the preferences window are now managed by Firefox
simplified "profile" preferences pane
declared an undeclared variable
fixed: no scrolling on Windows on "load URL/Script" preferences tab
removed some code that is not executed due an error (and which is already executed, without errors, in avoidMultipleInstances())
fixed a warning appearing in the error console
added names of localizers in the localization files based on the information contained in the readme.html file
removed custom about dialog and switched to default one
minor updates in install manifest