Ok, so I mainly use itch.io to play other people's games. I'm also poor, so I don't typically look to purchase games unless it's something really good and highly recommended in the community. So, that leaves me with playing games in browser. However, whenever I play certain Godot games in browser, I get this error,

Error

The following features required to run Godot projects on the Web are missing:

Cross Origin Isolation - Check web server configuration (send correct headers)

SharedArrayBuffer - Check web server configuration (send correct headers)

This is when I play in Firefox. If I change my browser to Google Chrome, my tab(s) crashes. Is this an issue on my part, or an issue with the publishing of the games? If there's something I can do on my part that might solve this, I would like to know how I can fix it. If not, then that's ok too.

Greetings.
I'm posting small test game made in Godot and aware of such problem. 
Tried to implement simple workaround. Would be Grateful if anyone can test this solution

https://x-pmods.itch.io/father-fishing
I provided in embed window link for situations when game not running.

Most part of fix I used from https://gist.github.com/nisovin/577e5596a36e899e8932747de1b7a353
but my browser is old and I prefer to block popups so it not working for all of my situations.

I added Explicit link for Player to use. 

1) at start of BODY of .html 

<a id="stat" href="">If not work OPEN IN NEW TAB</a>

2) and before <script src="NameOf_YOUR_game.js"></script> 

<script> let id = location.pathname.split('/')[2];

let url = '//itch.io/embed-upload/' + id + '?color=303333';

window.addEventListener('load', () => {

document.links["stat"].href = url;

});</script>

Hope anyone will find it useful. Have a Great Life.