I suspect so, but normally Mozilla would announce such a dramatic change (and I see no evidence of the that ... the option just disappeared).
I thought I might add Image Block but I can't get it to behave on a per-site basis.
My installed uBlock Origin has a feature to "Block media elements larger than [selectable] KB" under Default Behavior. The trick to enable such on a per-site basis is to set the size (eg, 20 KB) in the size window and NOT to select item for universal default behavior. (It took a while to suss that out.)
It's not as good a solution as that which used to be incorporated in Firefox which simply removed all images, but it's something.
Edited by grelber (01/10/20 10:37 PM)
Edit Reason: Corrected info