Greasy Fork is available in English.
Replace the link on hover with direct link to the image (with https).
Script is out of date.
Back in 2016, imgur had the https://imgur.com/asdfasdf url appear in a TextField on hovering the image which you could copy. This script would replace it with a direct link to the i.imgur.com/asdfasdf.jpg. Another reason for this script was that imgur didn't show the fullsize image back then, but a "thumbnail". The script is out of date as the TextField has been replaced by a "Copy Link" button.
Also you can easily just Right Click > Copy Image Link in Firefox now.
