Help with userContent.css for new tab

Hello, guys. I am having trouble editing the New Tab.

for some reason, i am unable to edit the .logo image. not even in the inspector. the new image just doesnt load.

i tried .svg and .png files, neither worked.

i feared it could be where the new image location, but then i put the full path and it did load anyway.

everything else i did on the about:newtab work. i even managed to change the color of the "Firefox" trademark

what should i do?

the file is in <profile>/chrome/fb1.png

that is my code

.logo {
	background-image: url("fb1.svg") !important;
}