no need to set textlayer properties which are overwritten in individual styles.

web/viewer.css

@@ -1305,8 +1305,6 @@ canvas {
   top: 0;
   right: 0;
   bottom: 0;
-  color: #000;
-  font-family: sans-serif;
   overflow: hidden;
 }
 
@@ -1677,7 +1675,7 @@ html[dir='rtl'] #documentPropertiesOverlay .row > * {
     background: url(images/toolbarButton-menuArrows@2x.png) no-repeat;
     background-size: 7px 16px;
   }
-  
+
   html[dir='ltr'] .toolbarButton#sidebarToggle::before {
     content: url(images/toolbarButton-sidebarToggle@2x.png);
   }
@@ -1967,4 +1965,3 @@ html[dir='rtl'] #documentPropertiesOverlay .row > * {
     display: none;
   }
 }
-