I might have same problem. I exported my SD settings from Firefox and want to import to my new Chromium (Chrome) browser but Firefox SD exports to a file backup.sd and importing in Chrome seems to want the backup file pasted into the import window. I've tried to open the ffx .sd and paste the .json file into the import window but that doesn't work either. I've spent a lot of time getting my dials in ffx setup just the way i want and would love to import them to Chrome and not have to start all over. Thanks!