using galaxy phone this does not do anything i still need to check desktop version this is broke

i tried using this from my android device and opening youtube in a default tab... and it did not perform the advertised work of switching to a desktop site.

совсем неработает

Better off to do this for each site - https://linustechtips.com/main/topic/882360-how-to-get-specific-websites-to-always-open-in-desktop-mode-on-mobile-firefox/

On ebay not working at all.
Edit regarding developers answer:
Desktop website was working before. I didn't want to tick it, that's why I've installed this add-on.
Not gonna try this one again.
Found one which works perfectly.

Doesn't functionate at all.

Trash. Doesn't work.