WhatsApp Web Mobile Adapter от Mahesh

Uses the existing WhatsApp Web and customizes it to get a better preview on mobile.

Directions:
On Android (Firefox browser)
1. Install the browser and install this extension.
2. Visit the site "web.whatsapp.com" and sign in.
3. Now the UI should be mobile-friendly.

On Iphone (Orion browser by Kagi)
1. Install the browser and install this extension.
2. Open Orion, go to Settings -> Privacy ->User Agent -> Custom and paste the below without any quotes
"Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:148.0) Gecko/20100101 Firefox/148.0"
3. Visit the site "web.whatsapp.com" and sign in.
4. Now the UI should be mobile-friendly.

Note: WhatsApp will redirect to "web.whatsapp.com/mobile" if the "Desktop site" or the "User agent" was not changed, so make sure to go back to "web.whatsapp.com" after updating.