Hello, I have been writing a .bat file, as well as experimenting with ShellBags in order to default Windows Explorer navigation pane settings and folder views / types to default. Currently, I have the .bat file configured to remove the NavPane (HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Modules\NavPane) and Sizer (HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Modules\GlobalSettings\Sizer) registry folders / items (As these are automatically regenerated with default values by Windows), as well as myriad ShellBag items and Desktop.ini files. It then restarts Windows Explorer. This .bat script, however, does not seem to default any customization made within Firefox's Save As window(s). For example, if I right-click an image, then select Save Image As, and then proceed to drag the explorer panes to be excessively wide, then exit Firefox, upon running the .bat file, the excessively wide navigation / explorer panes remain excessively wide. They do not default. Does Firefox store this pane customization information somewhere else? Can this be defaulted? Thank you!