How to change viewport background color?
If letterboxing (anti-fingerprinting) is used or when a webpage is smaller than the window (such as in about:config), Firefox fills in the rest of the window using a dark… (read more)
If letterboxing (anti-fingerprinting) is used or when a webpage is smaller than the window (such as in about:config), Firefox fills in the rest of the window using a dark gray. I want to make it completely black.
This is what I currently have in my userContent.css
```CSS @-moz-document url-prefix("about"), url-prefix("chrome"){
body{ background-color: rgb(0 0 0) !important };
.sticky-container{ background-color: rgb(0 0 0) !important };
#toolbar{ background-color: rgb(0 0 0) !important };
}@-moz-document url-prefix("about"), url-prefix("chrome"){
body{ background-color: rgb(0 0 0) !important };
.sticky-container{ background-color: rgb(0 0 0) !important };
#toolbar{ background-color: rgb(0 0 0) !important };
} ```