Getting started
Recent Browser
You will need a relatively new browser to use the extensions FR:Reborn provides. IE will not be supported.
Userscripts
Rate limiting
Imgur has pretty strict rate-limiting, so there is a big chance you hit it when uploading a lot of pictures after one each other. The best ways to get around it is either one of these.
Upload slow and steady
Try to stagger your uploads. Wait a minute or so before you upload a new album.
Use a VPN to get a new IP
Imgur rate-limits based on IP, so if you have a different IP, you'll be allowed to upload again.