The goal of this script is to allow you to export the models contained in a Sketchfab scene to a Blender-ready format without ever leaving the browser.
A download button will appear inside the scene viewer (as shown in the image below) when viewing a Sketchfab scene. The donwload action will download each mesh in the scene to a .OBJ and a .MTL file, in addition to downloading all the required textures. If your models are "flipped" after importing them into Blender, you should use the following settings during the import process:
If you have a userscript manager installed, clicking on this link should bring up a prompt to install the script.
Tested and working on Chrome + TamperMonkey and Opera + ViolentMonkey.