Fix a Firefox rendering bug

Firefox would revert to the default size for an element
if its height went past 17895698px. This fix just sets
height to zero when exceeding that value.

macrovision.js

@@ -475,8 +475,16 @@ function updateEntityElement(entity, element) {
     const extra = entity.views[view].image.extra;
     const bottom = entity.views[view].image.bottom;
     const bonus = (extra ? extra : 1) * (1 / (1 - (bottom ? bottom : 0)));
-    element.style.setProperty("--height", pixels * bonus + "px");
-    element.style.setProperty("--extra", pixels * bonus - pixels + "px");
+    let height = pixels * bonus;
+
+    // working around a Firefox bug here
+
+    if (height > 17895698) {
+        height = 0;
+    }
+
+    element.style.setProperty("--height", height + "px");
+    element.style.setProperty("--extra", height - pixels + "px");
 
     element.style.setProperty("--brightness", entity.brightness);