Same again with the logo - it's small, but if the script can make it smaller, that's great. If not, just let us know. Also, you might want to consider a white background, because the green doesn't stand out that much from the blue page background. Up to you.

(Confirmed that @nschloe is the maintainer of betterbib)

Squashed the logo. The green logo is fine, thanks for checking!

:-)