Where can I test the layout on non-standard large screen resolutions?

Question

HTML

Checking the layout up to 1920x1200 is as easy as shelling pears, but there was a need to test it a little at resolutions, for example, 3440x1440, etc. Is there a way to do this online somewhere? People like to zoom in, etc., I would like to have such an opportunity

Answer 1

For example, here quirktools.com/screenfly

Answer 2

If a little, then it is quite possible to get by with regular browser tools.
FF: ctrl + shift + m and enter the desired resolution with the handles.
Quite enough to view the correctness of the display.