Oh, well... It was worth trying.

It's strange, though. I've searched and found some Imgur/Firefox issues, but they've been few and far between. You might try contacting Imgur.

Have you tried with Safari? Even your legacy version may work.

And there's always DropBox.

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire