diff --git a/packages/react-devtools-inline/src/backend.js b/packages/react-devtools-inline/src/backend.js
index 849e103f218..2dd03417121 100644
--- a/packages/react-devtools-inline/src/backend.js
+++ b/packages/react-devtools-inline/src/backend.js
@@ -6,7 +6,10 @@ import {initBackend} from 'react-devtools-shared/src/backend';
 import {installHook} from 'react-devtools-shared/src/hook';
 import setupNativeStyleEditor from 'react-devtools-shared/src/backend/NativeStyleEditor/setupNativeStyleEditor';
 
-import type {BackendBridge} from 'react-devtools-shared/src/bridge';
+import type {
+  BackendBridge,
+  SavedPreferencesParams,
+} from 'react-devtools-shared/src/bridge';
 import type {Wall} from 'react-devtools-shared/src/frontend/types';
 import {
   getIfReloadedAndProfiling,
@@ -16,31 +19,14 @@ import {
 } from 'react-devtools-shared/src/utils';
 
 function startActivation(contentWindow: any, bridge: BackendBridge) {
-  const onSavedPreferences = (data: $FlowFixMe) => {
+  const onSavedPreferences = (data: SavedPreferencesParams) => {
     // This is the only message we're listening for,
     // so it's safe to cleanup after we've received it.
     bridge.removeListener('savedPreferences', onSavedPreferences);
 
-    const {
-      appendComponentStack,
-      breakOnConsoleErrors,
-      componentFilters,
-      showInlineWarningsAndErrors,
-      hideConsoleLogsInStrictMode,
-      disableSecondConsoleLogDimmingInStrictMode,
-    } = data;
-
-    contentWindow.__REACT_DEVTOOLS_APPEND_COMPONENT_STACK__ =
-      appendComponentStack;
-    contentWindow.__REACT_DEVTOOLS_BREAK_ON_CONSOLE_ERRORS__ =
-      breakOnConsoleErrors;
+    const {componentFilters} = data;
+
     contentWindow.__REACT_DEVTOOLS_COMPONENT_FILTERS__ = componentFilters;
-    contentWindow.__REACT_DEVTOOLS_SHOW_INLINE_WARNINGS_AND_ERRORS__ =
-      showInlineWarningsAndErrors;
-    contentWindow.__REACT_DEVTOOLS_HIDE_CONSOLE_LOGS_IN_STRICT_MODE__ =
-      hideConsoleLogsInStrictMode;
-    contentWindow.__REACT_DEVTOOLS_DISABLE_SECOND_CONSOLE_LOG_DIMMING_IN_STRICT_MODE__ =
-      disableSecondConsoleLogDimmingInStrictMode;
 
     // TRICKY
     // The backend entry point may be required in the context of an iframe or the parent window.
@@ -49,15 +35,7 @@ function startActivation(contentWindow: any, bridge: BackendBridge) {
     // Technically we don't need to store them on the contentWindow in this case,
     // but it doesn't really hurt anything to store them there too.
     if (contentWindow !== window) {
-      window.__REACT_DEVTOOLS_APPEND_COMPONENT_STACK__ = appendComponentStack;
-      window.__REACT_DEVTOOLS_BREAK_ON_CONSOLE_ERRORS__ = breakOnConsoleErrors;
       window.__REACT_DEVTOOLS_COMPONENT_FILTERS__ = componentFilters;
-      window.__REACT_DEVTOOLS_SHOW_INLINE_WARNINGS_AND_ERRORS__ =
-        showInlineWarningsAndErrors;
-      window.__REACT_DEVTOOLS_HIDE_CONSOLE_LOGS_IN_STRICT_MODE__ =
-        hideConsoleLogsInStrictMode;
-      window.__REACT_DEVTOOLS_DISABLE_SECOND_CONSOLE_LOG_DIMMING_IN_STRICT_MODE__ =
-        disableSecondConsoleLogDimmingInStrictMode;
     }
 
     finishActivation(contentWindow, bridge);
diff --git a/packages/react-devtools-shared/src/__tests__/setupTests.js b/packages/react-devtools-shared/src/__tests__/setupTests.js
index 6efcefe2f74..5774a573b31 100644
--- a/packages/react-devtools-shared/src/__tests__/setupTests.js
+++ b/packages/react-devtools-shared/src/__tests__/setupTests.js
@@ -240,9 +240,6 @@ beforeEach(() => {
   setSavedComponentFilters(getDefaultComponentFilters());
   global.__REACT_DEVTOOLS_COMPONENT_FILTERS__ = getDefaultComponentFilters();
 
-  // Also initialize inline warnings so that we can test them.
-  global.__REACT_DEVTOOLS_SHOW_INLINE_WARNINGS_AND_ERRORS__ = true;
-
   installHook(global, {
     appendComponentStack: true,
     breakOnConsoleErrors: false,
diff --git a/packages/react-devtools-shared/src/bridge.js b/packages/react-devtools-shared/src/bridge.js
index af98cb82989..16d7d3a36d4 100644
--- a/packages/react-devtools-shared/src/bridge.js
+++ b/packages/react-devtools-shared/src/bridge.js
@@ -191,7 +191,7 @@ type NativeStyleEditor_SetValueParams = {
   value: string,
 };
 
-type SavedPreferencesParams = {
+export type SavedPreferencesParams = {
   componentFilters: Array<ComponentFilter>,
 };