/* Sets background image and autoscale image to browser window. */
   body {
       background-image: url("wallpapers/wallpaper.avif") !important;
       background-size: cover !important;
       background-repeat: no-repeat !important;
       background-attachment: fixed !important;
       background-position-x: center !important;
       background-position-y: bottom !important;
   }

   @-moz-document url("about:newtab"), url("about:home") {
       .top-site-outer .title {
           color: white !important;
       }

       .logo-and-wordmark .wordmark {
           fill: white !important;
           color: #00aaff !important; /* fallback for text */
       }

       .context-menu-button.icon {
           fill: white !important; /* for SVG-based icons */
           color: white !important; /* for any text-based fallback */
           opacity: 1 !important; /* ensure visible even when normally dimmed */
       }
   }

I have installed an animated theme for my home page a while back, but recently if I minimize firefox the memory usage increases until it freezes my pc completely. I know this issue has been reported as Bug 1828587 2 years ago and it is said that it is fixed, but here I am experiencing the same thing. I would appreciate any help since I am not that good at coding a css file. Here is my userContent.css code if maybe i set something up wrong: @-moz-document url("about:newtab"), url("about:home"), url(about:privatebrowsing) { /* Sets background image and autoscale image to browser window. */ body { background-image: url("wallpapers/wallpaper.avif") !important; background-size: cover !important; background-repeat: no-repeat !important; background-attachment: fixed !important; background-position-x: center !important; background-position-y: bottom !important; } @-moz-document url("about:newtab"), url("about:home") { .top-site-outer .title { color: white !important; } .logo-and-wordmark .wordmark { fill: white !important; color: #00aaff !important; /* fallback for text */ } .context-menu-button.icon { fill: white !important; /* for SVG-based icons */ color: white !important; /* for any text-based fallback */ opacity: 1 !important; /* ensure visible even when normally dimmed */ } } The second part is to make some of the text on my homepage white so it is visible.