I just tried it and it's working perfectly. Please allow to save the images on any path.

*Edit: it's not always saving all the opened image tabs but i don't know the reason. I selected the "All tabs option" in the preferences. Al so please give the option to only download from tabs that only contain one image file (for example if you open one image on it's own tab) to be able to avoid closing tabs with web pages.

*Edit 2: I see, this addon is almost golden, with that option and fixing the "All tabs" problem it'll be very good. I didn't knew about the path restriction but no problem if not possible.

*Edit 3: Just tried the new version and now works perfectly for my use case with the new options. If if find any bug i'll report it. Thanks a lot for creating this add-on!