Since pinterest did not support to pin svg files, we have conver the svg file to jpg file while you click the pin button from the page. So you cant pin it using browser plugin or extension.
You can pin, save and share the images to your pinterest account without convert the svg to file to the jpg or png filetype.
We use php function to convert svg file to jpg and not all svg image can be converted same as the original image. So if you need to print out the image, we recommend you to print out the original svg files.