diff --git a/app/client/.eslintrc.cjs b/app/client/.eslintrc.cjs
index 0949c679..40f0b070 100644
--- a/app/client/.eslintrc.cjs
+++ b/app/client/.eslintrc.cjs
@@ -13,9 +13,14 @@ module.exports = {
   parser: "@typescript-eslint/parser",
   plugins: ["react-refresh"],
   rules: {
+    "no-extra-boolean-cast": "off",
     "react-refresh/only-export-components": [
       "warn",
-      { allowConstantExport: true },
+      { allowConstantExport: true }, // allow export const foo = 4
+    ],
+    "@typescript-eslint/no-unused-vars": [
+      "warn",
+      { argsIgnorePattern: "^_" }, // ignore unused args starting with _
     ],
   },
 };
diff --git a/app/client/src/components/providers.tsx b/app/client/src/components/providers.tsx
index 495e4cc6..02d078ca 100644
--- a/app/client/src/components/providers.tsx
+++ b/app/client/src/components/providers.tsx
@@ -8,7 +8,7 @@ import { RebateYearProvider } from "@/contexts/rebateYear";
 
 declare global {
   interface Window {
-    csb: any;
+    csb?: { toggleReactQueryDevtools: () => void };
   }
 }
 
@@ -22,11 +22,12 @@ export function Providers(props: { children: ReactNode }) {
   const { children } = props;
 
   const [queryClient] = useState(() => new QueryClient());
-  const [devtoolsDisplayed, setDevtoolsDisplayed] = useState(false);
+  const [reactQueryDevtoolsShown, setReactQueryDevtoolsShown] = useState(false);
 
   useEffect(() => {
-    window.csb ??= {};
-    window.csb.toggleDevtools = () => setDevtoolsDisplayed((value) => !value);
+    window.csb ??= {
+      toggleReactQueryDevtools: () => setReactQueryDevtoolsShown((val) => !val),
+    };
   });
 
   return (
@@ -37,7 +38,7 @@ export function Providers(props: { children: ReactNode }) {
         </NotificationsProvider>
       </DialogProvider>
 
-      {devtoolsDisplayed && (
+      {reactQueryDevtoolsShown && (
         <Suspense fallback={null}>
           <ReactQueryDevtoolsProduction />
         </Suspense>
diff --git a/app/client/src/contexts/dialog.tsx b/app/client/src/contexts/dialog.tsx
index 20a59ad6..5cd25cb0 100644
--- a/app/client/src/contexts/dialog.tsx
+++ b/app/client/src/contexts/dialog.tsx
@@ -1,3 +1,5 @@
+/* eslint-disable react-refresh/only-export-components */
+
 import type { Dispatch, ReactNode } from "react";
 import { createContext, useContext, useReducer } from "react";
 
diff --git a/app/client/src/contexts/notifications.tsx b/app/client/src/contexts/notifications.tsx
index e1853627..6fc70863 100644
--- a/app/client/src/contexts/notifications.tsx
+++ b/app/client/src/contexts/notifications.tsx
@@ -1,3 +1,5 @@
+/* eslint-disable react-refresh/only-export-components */
+
 import type { Dispatch, ReactNode } from "react";
 import { createContext, useContext, useReducer } from "react";
 
diff --git a/app/client/src/contexts/rebateYear.tsx b/app/client/src/contexts/rebateYear.tsx
index d006e014..13f01636 100644
--- a/app/client/src/contexts/rebateYear.tsx
+++ b/app/client/src/contexts/rebateYear.tsx
@@ -1,3 +1,5 @@
+/* eslint-disable react-refresh/only-export-components */
+
 import type { Dispatch, ReactNode } from "react";
 import { createContext, useContext, useReducer } from "react";
 
diff --git a/app/client/src/index.tsx b/app/client/src/index.tsx
index f6636159..1e982891 100644
--- a/app/client/src/index.tsx
+++ b/app/client/src/index.tsx
@@ -18,7 +18,7 @@ import "@/styles.css";
 
 const container = document.getElementById("root") as HTMLElement;
 
-function Index() {
+export default function Index() {
   return (
     <StrictMode>
       <ErrorBoundary>
diff --git a/app/client/src/routes/crf2022.tsx b/app/client/src/routes/crf2022.tsx
index 63da1ca5..86597dfe 100644
--- a/app/client/src/routes/crf2022.tsx
+++ b/app/client/src/routes/crf2022.tsx
@@ -63,7 +63,10 @@ function useFormioSubmissionQueryAndMutation(rebateId: string | undefined) {
          * https://github.com/formio/formio.js/blob/master/src/providers/storage/s3.js#L5
          * https://github.com/formio/formio.js/blob/master/src/providers/storage/xhr.js#L90
          */
-        Formio.Providers.providers.storage.s3 = function (formio: any) {
+        Formio.Providers.providers.storage.s3 = function (formio: {
+          formUrl: string;
+          [field: string]: unknown;
+        }) {
           const s3Formio = cloneDeep(formio);
           s3Formio.formUrl = `${serverUrl}/api/formio/2022/s3/crf/${mongoId}/${comboKey}`;
           return s3(s3Formio);
diff --git a/app/client/src/routes/frf2022.tsx b/app/client/src/routes/frf2022.tsx
index 9053a539..1c72d84d 100644
--- a/app/client/src/routes/frf2022.tsx
+++ b/app/client/src/routes/frf2022.tsx
@@ -63,16 +63,25 @@ function useFormioSubmissionQueryAndMutation(mongoId: string | undefined) {
          * https://github.com/formio/formio.js/blob/master/src/providers/storage/s3.js#L5
          * https://github.com/formio/formio.js/blob/master/src/providers/storage/xhr.js#L90
          */
-        Formio.Providers.providers.storage.s3 = function (formio: any) {
+        Formio.Providers.providers.storage.s3 = function (formio: {
+          formUrl: string;
+          [field: string]: unknown;
+        }) {
           const s3Formio = cloneDeep(formio);
           s3Formio.formUrl = `${serverUrl}/api/formio/2022/s3/frf/${mongoId}/${comboKey}`;
           return s3(s3Formio);
         };
 
-        // remove `ncesDataSource` and `ncesDataLookup` fields
         const data = { ...res.submission?.data };
-        if (data.hasOwnProperty("ncesDataSource")) delete data.ncesDataSource;
-        if (data.hasOwnProperty("ncesDataLookup")) delete data.ncesDataLookup;
+
+        // remove `ncesDataSource` and `ncesDataLookup` fields
+        // (https://eslint.org/docs/latest/rules/no-prototype-builtins)
+        if (Object.prototype.hasOwnProperty.call(data, "ncesDataSource")) {
+          delete data.ncesDataSource;
+        }
+        if (Object.prototype.hasOwnProperty.call(data, "ncesDataLookup")) {
+          delete data.ncesDataLookup;
+        }
 
         return Promise.resolve({
           ...res,
@@ -423,8 +432,13 @@ function FundingRequestForm(props: { email: string }) {
             const data = { ...onSubmitSubmission.data };
 
             // remove `ncesDataSource` and `ncesDataLookup` fields
-            if (data.hasOwnProperty("ncesDataSource")) delete data.ncesDataSource; // prettier-ignore
-            if (data.hasOwnProperty("ncesDataLookup")) delete data.ncesDataLookup; // prettier-ignore
+            // (https://eslint.org/docs/latest/rules/no-prototype-builtins)
+            if (Object.prototype.hasOwnProperty.call(data, "ncesDataSource")) {
+              delete data.ncesDataSource;
+            }
+            if (Object.prototype.hasOwnProperty.call(data, "ncesDataLookup")) {
+              delete data.ncesDataLookup;
+            }
 
             const updatedSubmission = {
               ...onSubmitSubmission,
@@ -502,8 +516,13 @@ function FundingRequestForm(props: { email: string }) {
             const data = { ...onNextPageParam.submission.data };
 
             // remove `ncesDataSource` and `ncesDataLookup` fields
-            if (data.hasOwnProperty("ncesDataSource")) delete data.ncesDataSource; // prettier-ignore
-            if (data.hasOwnProperty("ncesDataLookup")) delete data.ncesDataLookup; // prettier-ignore
+            // (https://eslint.org/docs/latest/rules/no-prototype-builtins)
+            if (Object.prototype.hasOwnProperty.call(data, "ncesDataSource")) {
+              delete data.ncesDataSource;
+            }
+            if (Object.prototype.hasOwnProperty.call(data, "ncesDataLookup")) {
+              delete data.ncesDataLookup;
+            }
 
             // "dirty check" – don't post an update if no changes have been made
             // to the form (ignoring current user fields)
diff --git a/app/client/src/routes/frf2023.tsx b/app/client/src/routes/frf2023.tsx
index fa13aca5..5226cbb8 100644
--- a/app/client/src/routes/frf2023.tsx
+++ b/app/client/src/routes/frf2023.tsx
@@ -62,7 +62,10 @@ function useFormioSubmissionQueryAndMutation(mongoId: string | undefined) {
          * https://github.com/formio/formio.js/blob/master/src/providers/storage/s3.js#L5
          * https://github.com/formio/formio.js/blob/master/src/providers/storage/xhr.js#L90
          */
-        Formio.Providers.providers.storage.s3 = function (formio: any) {
+        Formio.Providers.providers.storage.s3 = function (formio: {
+          formUrl: string;
+          [field: string]: unknown;
+        }) {
           const s3Formio = cloneDeep(formio);
           s3Formio.formUrl = `${serverUrl}/api/formio/2023/s3/frf/${mongoId}/${comboKey}`;
           return s3(s3Formio);
diff --git a/app/client/src/routes/prf2022.tsx b/app/client/src/routes/prf2022.tsx
index c597142b..a7502314 100644
--- a/app/client/src/routes/prf2022.tsx
+++ b/app/client/src/routes/prf2022.tsx
@@ -63,7 +63,10 @@ function useFormioSubmissionQueryAndMutation(rebateId: string | undefined) {
          * https://github.com/formio/formio.js/blob/master/src/providers/storage/s3.js#L5
          * https://github.com/formio/formio.js/blob/master/src/providers/storage/xhr.js#L90
          */
-        Formio.Providers.providers.storage.s3 = function (formio: any) {
+        Formio.Providers.providers.storage.s3 = function (formio: {
+          formUrl: string;
+          [field: string]: unknown;
+        }) {
           const s3Formio = cloneDeep(formio);
           s3Formio.formUrl = `${serverUrl}/api/formio/2022/s3/prf/${mongoId}/${comboKey}`;
           return s3(s3Formio);
diff --git a/app/client/src/utilities.ts b/app/client/src/utilities.ts
index c90058d9..6c7fa015 100644
--- a/app/client/src/utilities.ts
+++ b/app/client/src/utilities.ts
@@ -236,7 +236,7 @@ export type Rebate =
       };
     };
 
-async function fetchData<T = any>(url: string, options: RequestInit) {
+async function fetchData<T = unknown>(url: string, options: RequestInit) {
   try {
     const response = await fetch(url, options);
     const contentType = response.headers.get("content-type");
@@ -253,7 +253,7 @@ async function fetchData<T = any>(url: string, options: RequestInit) {
  * Fetches data and returns a promise containing JSON fetched from a provided
  * web service URL or handles any other OK response returned from the server
  */
-export function getData<T = any>(url: string) {
+export function getData<T = unknown>(url: string) {
   return fetchData<T>(url, {
     method: "GET",
     credentials: "include" as const,
@@ -264,7 +264,7 @@ export function getData<T = any>(url: string) {
  * Posts JSON data and returns a promise containing JSON fetched from a provided
  * web service URL or handles any other OK response returned from the server
  */
-export function postData<T = any>(url: string, data: object) {
+export function postData<T = unknown>(url: string, data: object) {
   return fetchData<T>(url, {
     method: "POST",
     credentials: "include" as const,