diff --git a/src/api/helpers.js b/src/api/helpers.js
index f965750c5..40b879232 100644
--- a/src/api/helpers.js
+++ b/src/api/helpers.js
@@ -71,7 +71,6 @@ export const promisedRequest = async ({
   url,
   payload,
   formData,
-  cache,
   credentials,
   headers = {},
 }) => {
@@ -88,10 +87,6 @@ export const promisedRequest = async ({
     options.headers['Content-Type'] = 'application/json'
   }
 
-  if (cache) {
-    options.cache = cache
-  }
-
   if (formData || payload) {
     options.body = formData || JSON.stringify(payload)
   }
diff --git a/src/services/style_setter/style_setter.js b/src/services/style_setter/style_setter.js
index dfb52f50d..2a695f4db 100644
--- a/src/services/style_setter/style_setter.js
+++ b/src/services/style_setter/style_setter.js
@@ -2,8 +2,6 @@ import sum from 'hash-sum'
 import localforage from 'localforage'
 import { chunk, throttle } from 'lodash'
 
-import { promisedRequest } from 'src/api/helpers.js'
-
 import { getCssRules } from '../theme_data/css_utils.js'
 import { getEngineChecksum, init } from '../theme_data/theme_data_3.service.js'
 
@@ -302,7 +300,7 @@ export const applyStyleConfig = (input) => {
   adoptStyleSheets()
 }
 
-export const getResourcesIndex = async (url, parser = x => x) => {
+export const getResourcesIndex = async (url, parser = JSON.parse) => {
   const cache = 'no-store'
   const customUrl = url.replace(/\.(\w+)$/, '.custom.$1')
   let builtin
@@ -316,15 +314,14 @@ export const getResourcesIndex = async (url, parser = x => x) => {
         return [
           k,
           () =>
-            promisedRequest({
-              url: v,
-              cache,
-            })
-            .then(({ data: text }) => parser(text))
-            .catch((e) => {
-              console.error(e)
-              return null
-            }),
+            window
+              .fetch(v, { cache })
+              .then((data) => data.text())
+              .then((text) => parser(text))
+              .catch((e) => {
+                console.error(e)
+                return null
+              }),
         ]
       } else {
         console.error(`Unknown resource format - ${k} is a ${typeof v}`)
@@ -334,16 +331,18 @@ export const getResourcesIndex = async (url, parser = x => x) => {
   }
 
   try {
-    const { data: builtinData } = await promisedRequest({ url, cache })
-    builtin = resourceTransform(builtinData)
+    const builtinData = await window.fetch(url, { cache })
+    const builtinResources = await builtinData.json()
+    builtin = resourceTransform(builtinResources)
   } catch {
     builtin = []
     console.warn(`Builtin resources at ${url} unavailable`)
   }
 
   try {
-    const { data: customData } = await promisedRequest({ url: customUrl, cache })
-    custom = resourceTransform(customData)
+    const customData = await window.fetch(customUrl, { cache })
+    const customResources = await customData.json()
+    custom = resourceTransform(customResources)
   } catch {
     custom = []
     console.warn(`Custom resources at ${customUrl} unavailable`)