diff --git a/docs/PROMPTS.md b/docs/PROMPTS.md
index 52b06d2..c216b27 100644
--- a/docs/PROMPTS.md
+++ b/docs/PROMPTS.md
@@ -22,11 +22,13 @@ You are a senior software engineer specializsing in NodeJS, Typescript, front en
 - Make no assumptions. 
 - Ask clarifying questions. 
 - Ultrathink
-- You will be syncing the desktop and mobile versions of the homepage
+- Troubleshoot UX problems when using Firefox
 
 *** CONTEXT ***
 - This is a modern web app for managing a vehicle fleet. It has both a desktop and mobile versions of the site that both need to maintain feature parity. It's currently deployed via docker compose but in the future will be deployed via k8s.
-- Read README.md CLAUDE.md and AI-INDEX.md and follow relevant instructions to understand this code repository in the context of this change. 
+- Read README.md CLAUDE.md and AI-INDEX.md and follow relevant instructions to understand this code repository in the context of this change.
+- The vehicles dynamic drop downs are broken on Firefox. The dropdowns don't populate immediately and require selecting and unselecting options to work. 
+- There is a console error "Error: Can't find the actor ID for objects-manager from root or target actor's form. types.js:559:11" 
 
 
 *** CHANGES TO IMPLEMENT ***
diff --git a/frontend/src/features/vehicles/components/VehicleForm.tsx b/frontend/src/features/vehicles/components/VehicleForm.tsx
index 66516ce..4445569 100644
--- a/frontend/src/features/vehicles/components/VehicleForm.tsx
+++ b/frontend/src/features/vehicles/components/VehicleForm.tsx
@@ -78,13 +78,14 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
   const [engines, setEngines] = useState<string[]>([]);
   const [trims, setTrims] = useState<string[]>([]);
   const [transmissions, setTransmissions] = useState<string[]>([]);
-  const [selectedYear, setSelectedYear] = useState<number | undefined>();
-  const [selectedMake, setSelectedMake] = useState<string>('');
-  const [selectedModel, setSelectedModel] = useState<string>('');
-  const [selectedTrim, setSelectedTrim] = useState<string>('');
   const [loadingDropdowns, setLoadingDropdowns] = useState(false);
   const hasInitialized = useRef(false);
   const isInitializing = useRef(false);
+  // Track previous values for cascade change detection (replaces useState)
+  const prevYear = useRef<number | undefined>(undefined);
+  const prevMake = useRef<string>('');
+  const prevModel = useRef<string>('');
+  const prevTrim = useRef<string>('');
   const [currentImageUrl, setCurrentImageUrl] = useState<string | undefined>(initialData?.imageUrl);
   const [previewUrl, setPreviewUrl] = useState<string | null>(null);
 
@@ -106,6 +107,7 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
   const watchedYear = watch('year');
   const watchedMake = watch('make');
   const watchedModel = watch('model');
+  const watchedTrim = watch('trimLevel');
 
   // Load years on component mount
   useEffect(() => {
@@ -133,7 +135,7 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
         setLoadingDropdowns(true);
 
         // Step 1: Set year and load makes
-        setSelectedYear(initialData.year);
+        prevYear.current = initialData.year;
         const makesData = await vehiclesApi.getMakes(initialData.year);
         setMakes(makesData);
 
@@ -143,7 +145,7 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
         }
 
         // Step 2: Set make and load models
-        setSelectedMake(initialData.make);
+        prevMake.current = initialData.make;
         const modelsData = await vehiclesApi.getModels(initialData.year, initialData.make);
         setModels(modelsData);
 
@@ -153,13 +155,13 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
         }
 
         // Step 3: Set model and load trims (transmissions loaded after trim selected)
-        setSelectedModel(initialData.model);
+        prevModel.current = initialData.model;
         const trimsData = await vehiclesApi.getTrims(initialData.year, initialData.make, initialData.model);
         setTrims(trimsData);
 
         if (initialData.trimLevel) {
           // Step 4: Set trim and load engines + transmissions
-          setSelectedTrim(initialData.trimLevel);
+          prevTrim.current = initialData.trimLevel;
           const [enginesData, transmissionsData] = await Promise.all([
             vehiclesApi.getEngines(
               initialData.year,
@@ -202,18 +204,18 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
     // Skip during initialization
     if (isInitializing.current) return;
 
-    if (watchedYear && watchedYear !== selectedYear) {
+    if (watchedYear && watchedYear !== prevYear.current) {
       const loadMakes = async () => {
         setLoadingDropdowns(true);
         try {
           const makesData = await vehiclesApi.getMakes(watchedYear);
           setMakes(makesData);
-          setSelectedYear(watchedYear);
+          prevYear.current = watchedYear;
 
           // Clear dependent selections
-          setSelectedMake('');
-          setSelectedModel('');
-          setSelectedTrim('');
+          prevMake.current = '';
+          prevModel.current = '';
+          prevTrim.current = '';
           setModels([]);
           setTrims([]);
           setEngines([]);
@@ -233,24 +235,24 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
 
       loadMakes();
     }
-  }, [watchedYear, selectedYear, setValue]);
+  }, [watchedYear, setValue]);
 
   // Load models when make changes
   useEffect(() => {
     // Skip during initialization
     if (isInitializing.current) return;
 
-    if (watchedMake && watchedYear && watchedMake !== selectedMake) {
+    if (watchedMake && watchedYear && watchedMake !== prevMake.current) {
       const loadModels = async () => {
         setLoadingDropdowns(true);
         try {
           const modelsData = await vehiclesApi.getModels(watchedYear, watchedMake);
           setModels(modelsData);
-          setSelectedMake(watchedMake);
+          prevMake.current = watchedMake;
 
           // Clear dependent selections
-          setSelectedModel('');
-          setSelectedTrim('');
+          prevModel.current = '';
+          prevTrim.current = '';
           setTrims([]);
           setEngines([]);
           setTransmissions([]);
@@ -268,23 +270,23 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
 
       loadModels();
     }
-  }, [watchedMake, watchedYear, selectedMake, setValue]);
+  }, [watchedMake, watchedYear, setValue]);
 
   // Load trims when model changes
   useEffect(() => {
     // Skip during initialization
     if (isInitializing.current) return;
 
-    if (watchedModel && watchedYear && selectedMake && watchedModel !== selectedModel) {
+    if (watchedModel && watchedYear && watchedMake && watchedModel !== prevModel.current) {
       const loadTrims = async () => {
         setLoadingDropdowns(true);
         try {
-          const trimsData = await vehiclesApi.getTrims(watchedYear, selectedMake, watchedModel);
+          const trimsData = await vehiclesApi.getTrims(watchedYear, watchedMake, watchedModel);
           setTrims(trimsData);
-          setSelectedModel(watchedModel);
+          prevModel.current = watchedModel;
 
-          // Clear deeper selections (trims, transmissions, engines)
-          setSelectedTrim('');
+          // Clear deeper selections (engines, transmissions)
+          prevTrim.current = '';
           setTransmissions([]);
           setEngines([]);
           setValue('trimLevel', '');
@@ -300,35 +302,34 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
 
       loadTrims();
     }
-  }, [watchedModel, watchedYear, selectedMake, selectedModel, setValue]);
+  }, [watchedModel, watchedYear, watchedMake, setValue]);
 
   // Load engines and transmissions when trim changes
   useEffect(() => {
     // Skip during initialization
     if (isInitializing.current) return;
 
-    const trimName = watch('trimLevel');
-    if (trimName && watchedYear && selectedMake && selectedModel) {
+    if (watchedTrim && watchedYear && watchedMake && watchedModel && watchedTrim !== prevTrim.current) {
       const loadEnginesAndTransmissions = async () => {
         setLoadingDropdowns(true);
         try {
           const [enginesData, transmissionsData] = await Promise.all([
             vehiclesApi.getEngines(
               watchedYear,
-              selectedMake,
-              selectedModel,
-              trimName
+              watchedMake,
+              watchedModel,
+              watchedTrim
             ),
             vehiclesApi.getTransmissions(
               watchedYear,
-              selectedMake,
-              selectedModel,
-              trimName
+              watchedMake,
+              watchedModel,
+              watchedTrim
             )
           ]);
           setEngines(enginesData);
           setTransmissions(transmissionsData);
-          setSelectedTrim(trimName);
+          prevTrim.current = watchedTrim;
         } catch (error) {
           console.error('Failed to load engines and transmissions:', error);
           setEngines([]);
@@ -340,7 +341,7 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
 
       loadEnginesAndTransmissions();
     }
-  }, [watchedYear, selectedMake, selectedModel, watch('trimLevel')]);
+  }, [watchedYear, watchedMake, watchedModel, watchedTrim, setValue]);
 
   const handleImageUpload = async (file: File) => {
     if (isEditMode && vehicleId) {
@@ -433,7 +434,7 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
           </label>
           <select
             {...register('year', { valueAsNumber: true })}
-            value={selectedYear || ''}
+            value={watchedYear || ''}
             onChange={(e) => {
               const year = parseInt(e.target.value);
               setValue('year', year);
@@ -456,10 +457,9 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
           </label>
           <select
             {...register('make')}
-            value={selectedMake}
+            value={watchedMake || ''}
             onChange={(e) => {
-              const make = e.target.value;
-              setValue('make', make);
+              setValue('make', e.target.value);
             }}
             className="w-full px-3 py-2 border rounded-md min-h-[44px] bg-white text-gray-900 border-gray-300 focus:outline-none focus:ring-2 focus:ring-primary-500 dark:bg-scuro dark:text-avus dark:border-silverstone dark:focus:ring-abudhabi dark:focus:border-abudhabi"
             disabled={loadingDropdowns || !watchedYear || makes.length === 0}
@@ -488,10 +488,9 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
           </label>
           <select
             {...register('model')}
-            value={selectedModel}
+            value={watchedModel || ''}
             onChange={(e) => {
-              const model = e.target.value;
-              setValue('model', model);
+              setValue('model', e.target.value);
             }}
             className="w-full px-3 py-2 border rounded-md min-h-[44px] bg-white text-gray-900 border-gray-300 focus:outline-none focus:ring-2 focus:ring-primary-500 dark:bg-scuro dark:text-avus dark:border-silverstone dark:focus:ring-abudhabi dark:focus:border-abudhabi"
             disabled={loadingDropdowns || !watchedMake || models.length === 0}
@@ -523,10 +522,9 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
           </label>
           <select
             {...register('trimLevel')}
-            value={selectedTrim}
+            value={watchedTrim || ''}
             onChange={(e) => {
-              const trim = e.target.value;
-              setValue('trimLevel', trim);
+              setValue('trimLevel', e.target.value);
             }}
             className="w-full px-3 py-2 border rounded-md min-h-[44px] bg-white text-gray-900 border-gray-300 focus:outline-none focus:ring-2 focus:ring-primary-500 dark:bg-scuro dark:text-avus dark:border-silverstone dark:focus:ring-abudhabi dark:focus:border-abudhabi"
             disabled={loadingDropdowns || !watchedModel || trims.length === 0}
@@ -557,13 +555,13 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
           <select
             {...register('engine')}
             className="w-full px-3 py-2 border rounded-md min-h-[44px] bg-white text-gray-900 border-gray-300 focus:outline-none focus:ring-2 focus:ring-primary-500 dark:bg-scuro dark:text-avus dark:border-silverstone dark:focus:ring-abudhabi dark:focus:border-abudhabi"
-            disabled={loadingDropdowns || !selectedTrim || engines.length === 0}
+            disabled={loadingDropdowns || !watchedTrim || engines.length === 0}
             style={{ fontSize: '16px' }}
           >
             <option value="">
               {loadingDropdowns
                 ? 'Loading...'
-                : !selectedTrim
+                : !watchedTrim
                 ? 'Select trim first'
                 : engines.length === 0
                 ? 'N/A (Electric)'
@@ -585,13 +583,13 @@ export const VehicleForm: React.FC<VehicleFormProps> = ({
           <select
             {...register('transmission')}
             className="w-full px-3 py-2 border rounded-md min-h-[44px] bg-white text-gray-900 border-gray-300 focus:outline-none focus:ring-2 focus:ring-primary-500 dark:bg-scuro dark:text-avus dark:border-silverstone dark:focus:ring-abudhabi dark:focus:border-abudhabi"
-            disabled={loadingDropdowns || !selectedTrim || transmissions.length === 0}
+            disabled={loadingDropdowns || !watchedTrim || transmissions.length === 0}
             style={{ fontSize: '16px' }}
           >
             <option value="">
               {loadingDropdowns
                 ? 'Loading...'
-                : !selectedTrim
+                : !watchedTrim
                 ? 'Select trim first'
                 : transmissions.length === 0
                 ? 'No transmissions available'