fix chromium based browers error, where particles expanded the view-screen

fireworks.css

@@ -1,17 +1,15 @@
 .fireworks {
-  position: absolute;
+  position: fixed;
+  overflow: hidden;
   top: 0;
   left: 0;
   width: 100%;
   height: 100%;
   pointer-events: none;
   z-index: 10;
-
-  /* activate the following for fixed positioning */
-  /*position: fixed;*/
-  /*overflow: hidden;*/
 }
 
+
 .rocket-trail {
   position: absolute;
   left: var(--trailX);