Open the original (largest) image in a new tab by pressing 'z' while hovering over a pin
< Feedback on Pinterest - Open Original Image
Yeah, sorry, it seems it doesn't work if you're not logged in. I'll have to update the requirements in the description.
Also, finding images with the srcset attribute is just a fallback for when the first method fails... sometimes the attribute exists, but not always. I primarily search through the React properties to find the original image URL.
Does not work for me. The script looks for images with srcset selector, I don't see such attribute in markup. Maybe that is because I am not logged in on pinterest.