Make GIF background transparent

[PixLab]

Did a try with the saulgoode overlay background http://chiselapp.com/user/saulgoode/repo...combine-bg
Created a WHITE layer at the bottom ➤ mode color erase then run the scm ➤ overlay background

on the gif it removes some white on the panda, but as a webp animation... not bad (a very slight transparency on the whites, though, but not bad)

GIF
   

WEBP