Information on Google Maps API v3 services has been split into individual chapters of the developer's guide:
Security notice: We have become aware of a security issue that may be affecting websites using specific third-party libraries (including polyfill.io). This issue can sometimes redirect visitors away from the intended website without website owner knowledge or permission. Many of our JavaScript samples previously included a
polyfill.io
script declaration. We have removed this from our samples. If you have used our JavaScript samples that contain this declaration, we recommend removing the declaration.