WhatsApp Web wants Google Chrome 60+

[Oneko]

Hello,
since today the webclient for WhatsApp tells me to update to Google Chrome 60+ or use Edge or Firefox. Yesterday it worked without flaws. I uninstalled the Duckduckgo-Extension already with no effect.
Maybe any ideas about this or other people with the same problem? No updates or installations since yesterday as far as I can remember. :smiling_face_with_open_mouth_cold_sweat:

Thank you in advance.

[Oneko]

Thank you for your quick reply.

I'm on W10 20H2 too. 3 extentions are installed: colorpicker, onlyoffice and omega proxyswitch.
My Vivaldi-"Specs":

Vivaldi	3.4.2066.106 (Stable channel) (64-Bit)
Betriebssystem	Windows 10 OS Version 2009 (Build 19042.630)
User-Agent	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36

I'll try a reboot of my notebook. I only restarted Vivaldi after uninstalling Duckduckgo - with no effect.

[Oneko]

No success with a reboot.
No success with deleting all cookies.
It works in a private window.
I disabled the ProxySwitcher just to be safe, but no effect.

So... deleting the local Vivaldi-profile maybe?

[Oneko]

Removing the extensions didn't help either.
I created a new profile and WA-Web stopped complaining. Reinstalled the proxy-switcher (only extension I really need) and connected to my Vivaldi-Account and it still works.

So, probably something in my local profile?!

Thank you very much for your help and your time.

PS: I'm pretty sure with Signal or Telegram this wouldn't happened.