Address Browser Console Warnings and Errors?

[hl2guide]

I'm not sure if this meets the bar of being a issue or not but please address the current browser console warnings and errors:

e.g.

This page uses the non standard property “zoom”. Consider using calc() in the relevant property values, or using “transform” along with “transform-origin: 0 0”

react-i18next:: It seems you are still using the old wait option, you may migrate to the new useSuspense behaviour. main.d279be67d6cfecf586fe.js:2:2637998

Error: Promised response from onMessage listener went out of scope

Layout was forced before the page was fully loaded. If stylesheets are not yet loaded this may cause a flash of unstyled content. markup.js:250:53

Addressing these might resolve the white flash page load issue and slow loading and I've experienced.