Can't enter custom size directly in pop-up

I'm an old guy, with a 15 inch MacBook Pro. The main thing is sizing the screen for Facebook. A while back I had it so I can move the screen from side to side to see everything, and that was fine.

all

Crashes Chrome when developer Tools bar is open and embedded at foot of browser

thanks for the latest update and not "selling the extension to someone who would have gained access to all your passwords, emails, etc without you even knowing it."

The green section - for inputting a resolution quickly - is not working in macOS > Chrome 79.

https://www.truffaut.com

no longer has any sizes will not load defaults and cannot save custom ones

still can't view a Facebook posting, I choose 1440 X 900 for "laptop"; get error "can not select that exact size", tried many other preset and no luck, tried custom (which I am now unable to use because I am unable to remember how to get to it)

Window resizing dimensions wrong