It is a very useful add-on. However, in the old version it was possible to set-up the counter in order to rename properly the downloaded files. In this this new version, the counter always starts with 1 and it seems working only in chrome. It is possible to restore the old version at least in Firefox?
bug reports go on the support site (gitlab, linked on the main page, or my email), not in AMO reviews. It's the rules and just common sense, and it is that way with every project. I'll look into your issue when I can though, follow progress here: https://gitlab.com/Marnes/doubleclick-image-downloader/issues/46
