Artstation Plus by Demiurge

— New Ratio parameter has been added to the preview list, which displays the ratio of likes to views. Each preview now shows the number of views and likes.
— Dropdown list has been added to the «Manage Portfolio» page for your Artstation artworks. This dropdown list allows you to sort your portfolio by date, views, likes, and ratios.
— «Download all images» button on each user profiles.
— Add to preview info about the place in the trends.
— Legacy Preview design — disable slow animation of title on previews. You can switch to modern design in the extension settings.
— General Statistics of Views and Likes

Unlike Chrome and Edge, Firefox does not ask for the permissions that Artstation Plus needs during installation. Firefox incorrectly labels the permissions that addon needs as "Optional permissions for added functionality". However, these permissions must be granted or Artstation Plus will not work. Open Extension, select «Artstation Plus», then «Permissions» and turn on «Access your data for sites in *artstation com domain».

Github: https://github.com/demiurge-ash/artstation-plus