Developers can download any original image from Figma in the Inspect tab, in the table view. Simply click the file name link to download the original.
Regarding the GIF plugin, it’s great too if you want to modify a GIF in Figma. However it exports everything in 2x size, therefore if you want smaller size, you need to shrink the frame with the GIF image.
P.S. I’m gonna move this topic to #product-questions as the solution exists already. 