The Google Earth now works in all programs browsing web except Chrome. That is, it works in Firefox, Edge, Vivaldi and Opera.
A brief history of Google Earth: In 2004, Google acquired a company called Keyhole. One of the company's products, called the Keyhole Viewer, displayed mapping data for the Earth. Google launched Google Earth in 2005 and then set out to map the entire world.
In 2017, Google has introduced a new version of Google Earth. It was only available on Chrome and Android, with the promise of bringing it to other Web browsers in the future. After three years (only), Google Earth is finally available for browsers other than Chrome. This happened thanks to Google switching from Native Client (NaCl) to WebAssembly (Wasm).
There is another browser that Google Earth does not have access to, it is Safari for which Google is committed to making Google Earth work in as many browsers as possible and this promise includes Apple Safari.