FileBot

As I am unable to drag'n'drop files to FB , (because it does not handle SMB:// paths) - I need to point the subtitles feature to the files each time.
Please save/restore working path for subtitle search, just like you already do with the rename path. - you need only to save one path, the last used, and use it for both features.

Also, please store the window size of the "open" dialog - the dialog box needs to be much wider to be able to select proper network share , when accessing /run/user/usename/gvfs/smb-share:server=servername,share=sharename

If you open /run/user/usename/gvfs/smb-share:server=servername,share=sharename in Nautilus, can't you DnD from there? If it's using the filesystem abstraction to view files then the DnD data should be normal filepaths as well.

if I open that, nautilus will start displaying it as smb:// - it detects that.