diff --git a/web/chat/chat-message-list.react.js b/web/chat/chat-message-list.react.js
--- a/web/chat/chat-message-list.react.js
+++ b/web/chat/chat-message-list.react.js
@@ -277,15 +277,14 @@
 const ConnectedChatMessageList: React.ComponentType<BaseProps> = React.memo<BaseProps>(
   function ConnectedChatMessageList(props: BaseProps): React.Node {
     const { threadInfo } = props;
-    const userAgent = useSelector(state => state.userAgent);
     const supportsReverseFlex = React.useMemo(() => {
-      const browser = detectBrowser(userAgent);
+      const browser = detectBrowser();
       return (
         !browser ||
         browser.name !== 'firefox' ||
         parseInt(browser.version) >= 81
       );
-    }, [userAgent]);
+    }, []);
 
     const messageListData = useMessageListData({
       threadInfo,
diff --git a/web/input/input-state-container.react.js b/web/input/input-state-container.react.js
--- a/web/input/input-state-container.react.js
+++ b/web/input/input-state-container.react.js
@@ -1255,12 +1255,12 @@
 
 const ConnectedInputStateContainer: React.ComponentType<BaseProps> = React.memo<BaseProps>(
   function ConnectedInputStateContainer(props) {
-    const exifRotate = useSelector(state => {
-      const browser = detectBrowser(state.userAgent);
+    const exifRotate = React.useMemo(() => {
+      const browser = detectBrowser();
       return (
         !browser || (browser.name !== 'safari' && browser.name !== 'chrome')
       );
-    });
+    }, []);
     const activeChatThreadID = useSelector(
       state => state.navInfo.activeChatThreadID,
     );
diff --git a/web/redux/redux-setup.js b/web/redux/redux-setup.js
--- a/web/redux/redux-setup.js
+++ b/web/redux/redux-setup.js
@@ -64,7 +64,6 @@
   enabledApps: EnabledApps,
   reportStore: ReportStore,
   nextLocalID: number,
-  userAgent: ?string,
   dataLoaded: boolean,
   windowActive: boolean,
   userPolicies: UserPolicies,