Fix scrolling in Firefox by making scrolling speed constant

src/components/Combat.vue

@@ -171,7 +171,7 @@ export default class Combat extends Vue {
     const target = this.$el.querySelector("#left-stats") as HTMLElement
 
     if (target !== null) {
-      this.doScroll(target, event.deltaY * 2, 0)
+      this.doScroll(target, event.deltaY > 0 ? 200 : -200, 0)
     }
   }
 
@@ -179,7 +179,7 @@ export default class Combat extends Vue {
     const target = this.$el.querySelector("#right-stats") as HTMLElement
 
     if (target !== null) {
-      this.doScroll(target, event.deltaY * 2, 0)
+      this.doScroll(target, event.deltaY > 0 ? 200 : -200, 0)
     }
   }