Add info that Firebase also doesn't support stream loading data like …

…AWS Lambda (#11640)

Firebase is a popular deployment target so users should know about this.

documentation/docs/20-core-concepts/20-load.md

@@ -534,7 +534,7 @@ export function load({ fetch }) {
 }
 ```
 
-> On platforms that do not support streaming, such as AWS Lambda, responses will be buffered. This means the page will only render once all promises resolve. If you are using a proxy (e.g. NGINX), make sure it does not buffer responses from the proxied server.
+> On platforms that do not support streaming, such as AWS Lambda or Firebase, responses will be buffered. This means the page will only render once all promises resolve. If you are using a proxy (e.g. NGINX), make sure it does not buffer responses from the proxied server.
 
 > Streaming data will only work when JavaScript is enabled. You should avoid returning promises from a universal `load` function if the page is server rendered, as these are _not_ streamed — instead, the promise is recreated when the function reruns in the browser.