diff --git a/macrovision.js b/macrovision.js
index 990cfc10..ef216203 100644
--- a/macrovision.js
+++ b/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);