no lazy load plugin by Tension Extension
BSD 2-clause based on the current Firefox add-ons page. Please note, I cannot update that add-on.
I could not find a public repository, so here it is. With changes. I like it because it's simple. It could be a GreaseMonkey / TamperMonkey user script for Chrome as well.
If you use Download All Images it will get all of the data-srcset images. Letting no-lazy-load pre-process the page results in a single, optimal image.