diff --git a/desktop/app/src/App.tsx b/desktop/app/src/App.tsx
index c68895ad5..ec8f0d4ae 100644
--- a/desktop/app/src/App.tsx
+++ b/desktop/app/src/App.tsx
@@ -12,7 +12,6 @@ import {FlexRow, styled, Layout} from 'flipper';
 import {connect} from 'react-redux';
 import TitleBar from './chrome/TitleBar';
 import MainSidebar2 from './chrome/mainsidebar/MainSidebar2';
-import ErrorBar from './chrome/ErrorBar';
 import DoctorBar from './chrome/DoctorBar';
 import ShareSheetExportUrl from './chrome/ShareSheetExportUrl';
 import SignInSheet from './chrome/SignInSheet';
@@ -40,7 +39,7 @@ import {
 } from './reducers/application';
 import {Logger} from './fb-interfaces/Logger';
 import {State as Store} from './reducers/index';
-import {StaticView, FlipperError} from './reducers/connections';
+import {StaticView} from './reducers/connections';
 import PluginManager from './chrome/plugin-manager/PluginManager';
 import StatusBar from './chrome/StatusBar';
 import SettingsSheet from './chrome/SettingsSheet';
@@ -59,7 +58,6 @@ type OwnProps = {
 
 type StateFromProps = {
   leftSidebarVisible: boolean;
-  errors: FlipperError[];
   activeSheet: ActiveSheet;
   share: ShareType | null;
   staticView: StaticView;
@@ -174,7 +172,6 @@ export class App extends React.Component<Props> {
           <>
             <TitleBar version={version} />
             <DoctorBar />
-            <ErrorBar />
           </>
           <>
             <Sheet>{this.getSheet}</Sheet>
@@ -214,12 +211,11 @@ export class App extends React.Component<Props> {
 export default connect<StateFromProps, DispatchProps, OwnProps, Store>(
   ({
     application: {leftSidebarVisible, activeSheet, share},
-    connections: {errors, staticView},
+    connections: {staticView},
   }) => ({
     leftSidebarVisible,
     activeSheet,
     share: share,
-    errors,
     staticView,
   }),
   {
diff --git a/desktop/app/src/__tests__/__snapshots__/createMockFlipperWithPlugin.node.tsx.snap b/desktop/app/src/__tests__/__snapshots__/createMockFlipperWithPlugin.node.tsx.snap
index 297ea342c..1b4387c78 100644
--- a/desktop/app/src/__tests__/__snapshots__/createMockFlipperWithPlugin.node.tsx.snap
+++ b/desktop/app/src/__tests__/__snapshots__/createMockFlipperWithPlugin.node.tsx.snap
@@ -25,7 +25,6 @@ Object {
       "title": "MockAndroidDevice",
     },
   ],
-  "errors": Array [],
   "selectedApp": "TestApp#Android#MockAndroidDevice#serial",
   "selectedDevice": Object {
     "deviceType": "physical",
diff --git a/desktop/app/src/chrome/ErrorBar.tsx b/desktop/app/src/chrome/ErrorBar.tsx
deleted file mode 100644
index 2bf69f3a2..000000000
--- a/desktop/app/src/chrome/ErrorBar.tsx
+++ /dev/null
@@ -1,200 +0,0 @@
-/**
- * Copyright (c) Facebook, Inc. and its affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- *
- * @format
- */
-
-import {styled, colors, Glyph} from 'flipper';
-import React, {useState, memo} from 'react';
-import {connect} from 'react-redux';
-import {FlipperError, dismissError} from '../reducers/connections';
-import {State as Store} from '../reducers/index';
-import {ErrorBlock, ButtonGroup, Button} from 'flipper';
-import {FlexColumn, FlexRow} from 'flipper';
-
-type StateFromProps = {
-  errors: FlipperError[];
-};
-
-type DispatchFromProps = {
-  dismissError: typeof dismissError;
-};
-
-type Props = DispatchFromProps & StateFromProps;
-
-const ErrorBar = memo(function ErrorBar(props: Props) {
-  const [collapsed, setCollapsed] = useState(true);
-
-  if (!props.errors.length) {
-    return null;
-  }
-
-  const errorCount = props.errors.reduce(
-    (sum, error) => sum + (error.occurrences || 1),
-    0,
-  );
-
-  const urgentErrors = props.errors.filter((e) => e.urgent);
-
-  return (
-    <ErrorBarContainer>
-      <ErrorRows
-        className={collapsed && urgentErrors.length === 0 ? 'collapsed' : ''}>
-        {(collapsed ? urgentErrors : props.errors).map((error, index) => (
-          <ErrorTile
-            onDismiss={() => props.dismissError(index)}
-            key={index}
-            error={error}
-          />
-        ))}
-      </ErrorRows>
-      <DismissAllErrors
-        onClick={() => setCollapsed((c) => !c)}
-        title="Show / hide errors">
-        <Glyph
-          color={colors.white}
-          size={8}
-          name={collapsed ? 'chevron-down' : 'chevron-up'}
-          style={{marginRight: 4}}
-        />
-        {collapsed && errorCount}
-      </DismissAllErrors>
-    </ErrorBarContainer>
-  );
-});
-
-export default connect<StateFromProps, DispatchFromProps, {}, Store>(
-  ({connections: {errors}}) => ({
-    errors,
-  }),
-  {
-    dismissError,
-  },
-)(ErrorBar);
-
-function ErrorTile({
-  onDismiss,
-  error,
-}: {
-  onDismiss: () => void;
-  error: FlipperError;
-}) {
-  const [collapsed, setCollapsed] = useState(true);
-  return (
-    <ErrorRow className={`${error.urgent ? 'urgent' : ''}`}>
-      <FlexRow style={{flexDirection: 'row-reverse'}}>
-        <ButtonSection>
-          <ButtonGroup>
-            {(error.details || error.error) && (
-              <Button
-                onClick={() => setCollapsed((s) => !s)}
-                icon={collapsed ? `chevron-down` : 'chevron-up'}
-                iconSize={12}
-              />
-            )}
-            <Button onClick={onDismiss} icon="cross-circle" iconSize={12} />
-          </ButtonGroup>
-        </ButtonSection>
-        {error.occurrences! > 1 && (
-          <ErrorCounter title="Nr of times this error occurred">
-            {error.occurrences}
-          </ErrorCounter>
-        )}
-        <FlexColumn
-          style={
-            collapsed
-              ? {overflow: 'hidden', whiteSpace: 'nowrap', flexGrow: 1}
-              : {flexGrow: 1}
-          }
-          title={error.message}>
-          {error.message}
-        </FlexColumn>
-      </FlexRow>
-      {!collapsed && (
-        <FlexRow>
-          <ErrorDetails>
-            {error.details}
-            {error.error && <ErrorBlock error={error.error} />}
-          </ErrorDetails>
-        </FlexRow>
-      )}
-    </ErrorRow>
-  );
-}
-
-const ErrorBarContainer = styled.div({
-  boxShadow: '2px 2px 2px #ccc',
-  userSelect: 'text',
-});
-
-const DismissAllErrors = styled.div({
-  boxShadow: '2px 2px 2px #ccc',
-  backgroundColor: colors.cherryDark3,
-  color: '#fff',
-  textAlign: 'center',
-  borderBottomLeftRadius: '4px',
-  borderBottomRightRadius: '4px',
-  position: 'absolute',
-  width: '48px',
-  height: '16px',
-  zIndex: 2,
-  right: '20px',
-  fontSize: '6pt',
-  lineHeight: '16px',
-  cursor: 'pointer',
-  alignItems: 'center',
-});
-
-const ErrorDetails = styled.div({
-  width: '100%',
-  marginTop: 4,
-});
-
-const ErrorRows = styled.div({
-  color: '#fff',
-  maxHeight: '600px',
-  overflowY: 'auto',
-  overflowX: 'hidden',
-  transition: 'max-height 0.3s ease',
-  borderBottom: '1px solid #b3b3b3',
-  '&.collapsed': {
-    maxHeight: '0px',
-    borderBottom: 'none',
-  },
-});
-
-const ErrorRow = styled.div({
-  padding: '4px 12px',
-  verticalAlign: 'middle',
-  lineHeight: '28px',
-  backgroundColor: colors.yellowTint,
-  color: colors.yellow,
-  '&.urgent': {
-    backgroundColor: colors.redTint,
-    color: colors.red,
-  },
-});
-
-const ButtonSection = styled(FlexColumn)({
-  marginLeft: '8px',
-  flexShrink: 0,
-  flexGrow: 0,
-});
-
-const ErrorCounter = styled(FlexColumn)({
-  border: `1px solid ${colors.light20}`,
-  color: colors.light20,
-  width: 20,
-  height: 20,
-  borderRadius: 20,
-  marginTop: 4,
-  lineHeight: '18px',
-  textAlign: 'center',
-  flexShrink: 0,
-  flexGrow: 0,
-  marginLeft: '8px',
-  fontSize: '10px',
-});
diff --git a/desktop/app/src/dispatcher/androidDevice.tsx b/desktop/app/src/dispatcher/androidDevice.tsx
index a9bdee57e..e8c18baa1 100644
--- a/desktop/app/src/dispatcher/androidDevice.tsx
+++ b/desktop/app/src/dispatcher/androidDevice.tsx
@@ -19,7 +19,7 @@ import which from 'which';
 import {promisify} from 'util';
 import {ServerPorts} from '../reducers/application';
 import {Client as ADBClient} from 'adbkit';
-import {addNotification} from '../reducers/notifications';
+import {addErrorNotification} from '../reducers/notifications';
 
 function createDevice(
   adbClient: ADBClient,
@@ -84,22 +84,14 @@ function createDevice(
           const isAuthorizationError = (e?.message as string)?.includes(
             'device unauthorized',
           );
-          console.error('Failed to initialize device: ' + device.id, e);
           store.dispatch(
-            addNotification({
-              client: null,
-              notification: {
-                id: 'androidDeviceConnectionError' + device.id,
-                title: 'Could not connect to ' + device.id,
-                severity: 'error',
-                message: `Failed to connect to '${device.id}': ${
-                  isAuthorizationError
-                    ? 'make sure to authorize debugging on the phone'
-                    : JSON.stringify(e, null, 2)
-                }`,
-              },
-              pluginId: 'androidDevice',
-            }),
+            addErrorNotification(
+              'Could not connect to ' + device.id,
+              isAuthorizationError
+                ? 'Make sure to authorize debugging on the phone'
+                : 'Failed to setup connection',
+              e,
+            ),
           );
         }
         resolve(undefined); // not ready yet, we will find it in the next tick
diff --git a/desktop/app/src/dispatcher/iOSDevice.tsx b/desktop/app/src/dispatcher/iOSDevice.tsx
index 03dfbda08..78906397d 100644
--- a/desktop/app/src/dispatcher/iOSDevice.tsx
+++ b/desktop/app/src/dispatcher/iOSDevice.tsx
@@ -20,6 +20,7 @@ import iosUtil from '../utils/iOSContainerUtility';
 import IOSDevice from '../devices/IOSDevice';
 import isProduction from '../utils/isProduction';
 import {registerDeviceCallbackOnPlugins} from '../utils/onRegisterDevice';
+import {addErrorNotification} from '../reducers/notifications';
 
 type iOSSimulatorDevice = {
   state: 'Booted' | 'Shutdown' | 'Shutting Down';
@@ -209,18 +210,10 @@ async function checkXcodeVersionMismatch(store: Store) {
       );
       const runningVersion = match && match.length > 0 ? match[0].trim() : null;
       if (runningVersion && runningVersion !== xcodeCLIVersion) {
-        const errorMessage = `Xcode version mismatch: Simulator is running from "${runningVersion}" while Xcode CLI is "${xcodeCLIVersion}". Running "xcode-select --switch ${runningVersion}" can fix this.`;
-        store.dispatch({
-          type: 'SERVER_ERROR',
-          payload: {
-            message: errorMessage,
-            details:
-              "You might want to run 'sudo xcode-select -s /Applications/Xcode.app/Contents/Developer'",
-            urgent: true,
-          },
-        });
-        // Fire a console.error as well, so that it gets reported to the backend.
-        console.error(errorMessage);
+        const errorMessage = `Xcode version mismatch: Simulator is running from "${runningVersion}" while Xcode CLI is "${xcodeCLIVersion}". Running "xcode-select --switch ${runningVersion}" can fix this. For example: "sudo xcode-select -s /Applications/Xcode.app/Contents/Developer"`;
+        store.dispatch(
+          addErrorNotification('Xcode version mismatch', errorMessage),
+        );
         xcodeVersionMismatchFound = true;
         break;
       }
diff --git a/desktop/app/src/dispatcher/metroDevice.tsx b/desktop/app/src/dispatcher/metroDevice.tsx
index 74c97da35..dafd3dfae 100644
--- a/desktop/app/src/dispatcher/metroDevice.tsx
+++ b/desktop/app/src/dispatcher/metroDevice.tsx
@@ -13,6 +13,7 @@ import {registerDeviceCallbackOnPlugins} from '../utils/onRegisterDevice';
 import MetroDevice from '../devices/MetroDevice';
 import {ArchivedDevice} from 'flipper';
 import http from 'http';
+import {addErrorNotification} from '../reducers/notifications';
 
 const METRO_PORT = 8081;
 const METRO_HOST = 'localhost';
@@ -129,15 +130,12 @@ export default (store: Store, logger: Logger) => {
 
       const guard = setTimeout(() => {
         // Metro is running, but didn't respond to /events endpoint
-        store.dispatch({
-          type: 'SERVER_ERROR',
-          payload: {
-            message:
-              "Found a running Metro instance, but couldn't connect to the logs. Probably your React Native version is too old to support Flipper.",
-            details: `Failed to get a connection to ${METRO_LOGS_ENDPOINT} in a timely fashion`,
-            urgent: true,
-          },
-        });
+        store.dispatch(
+          addErrorNotification(
+            'Failed to connect to Metro',
+            `Flipper did find a running Metro instance, but couldn't connect to the logs. Probably your React Native version is too old to support Flipper. Cause: Failed to get a connection to ${METRO_LOGS_ENDPOINT} in a timely fashion`,
+          ),
+        );
         registerDevice(undefined, store, logger);
         // Note: no scheduleNext, we won't retry until restart
       }, 5000);
diff --git a/desktop/app/src/dispatcher/server.tsx b/desktop/app/src/dispatcher/server.tsx
index 991ab5c8a..be8445586 100644
--- a/desktop/app/src/dispatcher/server.tsx
+++ b/desktop/app/src/dispatcher/server.tsx
@@ -13,6 +13,7 @@ import {Store} from '../reducers/index';
 import {Logger} from '../fb-interfaces/Logger';
 import Client from '../Client';
 import {UninitializedClient} from '../UninitializedClient';
+import {addErrorNotification} from '../reducers/notifications';
 
 export default (store: Store, logger: Logger) => {
   const server = new Server(logger, store);
@@ -42,17 +43,14 @@ export default (store: Store, logger: Logger) => {
   });
 
   server.addListener('error', (err) => {
-    const message: string =
-      err.code === 'EADDRINUSE'
-        ? "Couldn't start websocket server. Looks like you have multiple copies of Flipper running."
-        : err.message || 'Unknown error';
-    const urgent = err.code === 'EADDRINUSE';
-
-    store.dispatch({
-      type: 'SERVER_ERROR',
-      payload: {message},
-      urgent,
-    });
+    store.dispatch(
+      addErrorNotification(
+        'Failed to start websocket server',
+        err.code === 'EADDRINUSE'
+          ? "Couldn't start websocket server. Looks like you have multiple copies of Flipper running."
+          : err.message || 'Unknown error',
+      ),
+    );
   });
 
   server.addListener('start-client-setup', (client: UninitializedClient) => {
@@ -74,11 +72,14 @@ export default (store: Store, logger: Logger) => {
 
   server.addListener(
     'client-setup-error',
-    (payload: {client: UninitializedClient; error: Error}) => {
-      store.dispatch({
-        type: 'CLIENT_SETUP_ERROR',
-        payload: payload,
-      });
+    ({client, error}: {client: UninitializedClient; error: Error}) => {
+      store.dispatch(
+        addErrorNotification(
+          `Connection to '${client.appName}' on '${client.deviceName}' failed`,
+          'Failed to start client connection',
+          error,
+        ),
+      );
     },
   );
 
diff --git a/desktop/app/src/reducers/__tests__/connections.node.tsx b/desktop/app/src/reducers/__tests__/connections.node.tsx
index 3c2f1bff9..b82f5ed2e 100644
--- a/desktop/app/src/reducers/__tests__/connections.node.tsx
+++ b/desktop/app/src/reducers/__tests__/connections.node.tsx
@@ -14,27 +14,6 @@ import MacDevice from '../../devices/MacDevice';
 import {FlipperDevicePlugin} from '../../plugin';
 import MetroDevice from '../../devices/MetroDevice';
 
-test('REGISTER_DEVICE doesnt remove error', () => {
-  const initialState: State = reducer(undefined, {
-    type: 'SERVER_ERROR',
-    payload: {message: 'something went wrong'},
-  });
-
-  // Precondition
-  expect(initialState.errors).toEqual([
-    {message: 'something went wrong', occurrences: 1},
-  ]);
-
-  const endState = reducer(initialState, {
-    type: 'REGISTER_DEVICE',
-    payload: new BaseDevice('serial', 'physical', 'title', 'Android'),
-  });
-
-  expect(endState.errors).toEqual([
-    {message: 'something went wrong', occurrences: 1},
-  ]);
-});
-
 test('doing a double REGISTER_DEVICE keeps the last', () => {
   const device1 = new BaseDevice('serial', 'physical', 'title', 'Android');
   const device2 = new BaseDevice('serial', 'physical', 'title2', 'Android');
@@ -105,71 +84,6 @@ test('triggering REGISTER_DEVICE before REGISTER_PLUGINS still registers device
   expect(endState.devices[0].devicePlugins).toEqual(['test']);
 });
 
-test('errors are collected on a by name basis', () => {
-  const initialState: State = reducer(undefined, {
-    type: 'SERVER_ERROR',
-    payload: {
-      message: 'error1',
-      error: 'stack1',
-    },
-  });
-
-  expect(initialState.errors).toMatchInlineSnapshot(`
-        Array [
-          Object {
-            "error": "stack1",
-            "message": "error1",
-            "occurrences": 1,
-          },
-        ]
-    `);
-
-  const state2: State = reducer(initialState, {
-    type: 'SERVER_ERROR',
-    payload: {
-      message: 'error2',
-      error: 'stack2',
-    },
-  });
-  // There are now two errors
-  expect(state2.errors).toMatchInlineSnapshot(`
-        Array [
-          Object {
-            "error": "stack1",
-            "message": "error1",
-            "occurrences": 1,
-          },
-          Object {
-            "error": "stack2",
-            "message": "error2",
-            "occurrences": 1,
-          },
-        ]
-    `);
-  const state3: State = reducer(state2, {
-    type: 'SERVER_ERROR',
-    payload: {
-      message: 'error1',
-      error: 'stack3',
-    },
-  });
-  // Still two errors, but error1 has been updated and occurrences increased
-  expect(state3.errors).toMatchInlineSnapshot(`
-    Array [
-      Object {
-        "error": "stack3",
-        "message": "error1",
-        "occurrences": 2,
-      },
-      Object {
-        "error": "stack2",
-        "message": "error2",
-        "occurrences": 1,
-      },
-    ]
-  `);
-});
-
 test('selectPlugin sets deepLinkPayload correctly', () => {
   const state = reducer(
     undefined,
diff --git a/desktop/app/src/reducers/__tests__/notifications.node.tsx b/desktop/app/src/reducers/__tests__/notifications.node.tsx
index 0f303134a..2c100e02c 100644
--- a/desktop/app/src/reducers/__tests__/notifications.node.tsx
+++ b/desktop/app/src/reducers/__tests__/notifications.node.tsx
@@ -7,7 +7,7 @@
  * @format
  */
 
-import {State} from '../notifications';
+import {State, addNotification} from '../notifications';
 
 import {
   default as reducer,
@@ -106,3 +106,66 @@ test('reduce setActiveNotifications', () => {
     ],
   });
 });
+
+test('addNotification removes duplicates', () => {
+  let res = reducer(
+    getInitialState(),
+    addNotification({
+      pluginId: 'test',
+      client: null,
+      notification,
+    }),
+  );
+  res = reducer(
+    res,
+    addNotification({
+      pluginId: 'test',
+      client: null,
+      notification: {
+        ...notification,
+        id: 'otherId',
+      },
+    }),
+  );
+  res = reducer(
+    res,
+    addNotification({
+      pluginId: 'test',
+      client: null,
+      notification: {
+        ...notification,
+        message: 'slightly different message',
+      },
+    }),
+  );
+  expect(res).toMatchInlineSnapshot(`
+    Object {
+      "activeNotifications": Array [
+        Object {
+          "client": null,
+          "notification": Object {
+            "id": "otherId",
+            "message": "message",
+            "severity": "warning",
+            "title": "title",
+          },
+          "pluginId": "test",
+        },
+        Object {
+          "client": null,
+          "notification": Object {
+            "id": "id",
+            "message": "slightly different message",
+            "severity": "warning",
+            "title": "title",
+          },
+          "pluginId": "test",
+        },
+      ],
+      "blacklistedCategories": Array [],
+      "blacklistedPlugins": Array [],
+      "clearedNotifications": Set {},
+      "invalidatedNotifications": Array [],
+    }
+  `);
+});
diff --git a/desktop/app/src/reducers/connections.tsx b/desktop/app/src/reducers/connections.tsx
index 0526ec8fb..5baed1a24 100644
--- a/desktop/app/src/reducers/connections.tsx
+++ b/desktop/app/src/reducers/connections.tsx
@@ -37,14 +37,6 @@ export type StaticView =
   | typeof SupportRequestDetails
   | typeof ConsoleLogs;
 
-export type FlipperError = {
-  occurrences?: number;
-  message: string;
-  details?: string;
-  error?: Error | string;
-  urgent?: boolean; // if true this error should always popup up
-};
-
 export type State = {
   devices: Array<BaseDevice>;
   androidEmulators: Array<string>;
@@ -55,7 +47,6 @@ export type State = {
   userPreferredPlugin: null | string;
   userPreferredApp: null | string;
   userStarredPlugins: {[client: string]: string[]};
-  errors: FlipperError[];
   clients: Array<Client>;
   uninitializedClients: Array<{
     client: UninitializedClient;
@@ -97,10 +88,6 @@ export type Action =
       type: 'SELECT_USER_PREFERRED_PLUGIN';
       payload: string;
     }
-  | {
-      type: 'SERVER_ERROR';
-      payload: null | FlipperError;
-    }
   | {
       type: 'NEW_CLIENT';
       payload: Client;
@@ -121,19 +108,11 @@ export type Action =
       type: 'FINISH_CLIENT_SETUP';
       payload: {client: UninitializedClient; deviceId: string};
     }
-  | {
-      type: 'CLIENT_SETUP_ERROR';
-      payload: {client: UninitializedClient; error: FlipperError};
-    }
   | {
       type: 'SET_STATIC_VIEW';
       payload: StaticView;
       deepLinkPayload: unknown;
     }
-  | {
-      type: 'DISMISS_ERROR';
-      payload: number;
-    }
   | {
       // Implemented by rootReducer in `store.tsx`
       type: 'STAR_PLUGIN';
@@ -160,7 +139,6 @@ const INITAL_STATE: State = {
   userPreferredPlugin: null,
   userPreferredApp: null,
   userStarredPlugins: {},
-  errors: [],
   clients: [],
   uninitializedClients: [],
   deepLinkPayload: null,
@@ -327,13 +305,6 @@ export default (state: State = INITAL_STATE, action: Actions): State => {
       const {payload: userPreferredDevice} = action;
       return {...state, userPreferredDevice};
     }
-    case 'SERVER_ERROR': {
-      const {payload} = action;
-      if (!payload) {
-        return state;
-      }
-      return {...state, errors: mergeError(state.errors, payload)};
-    }
     case 'START_CLIENT_SETUP': {
       const {payload} = action;
       return {
@@ -357,39 +328,6 @@ export default (state: State = INITAL_STATE, action: Actions): State => {
           .sort((a, b) => a.client.appName.localeCompare(b.client.appName)),
       };
     }
-    case 'CLIENT_SETUP_ERROR': {
-      const {payload} = action;
-
-      const errorMessage =
-        payload.error instanceof Error
-          ? payload.error.message
-          : '' + payload.error;
-      const details = `Client setup error: ${errorMessage} while setting up client: ${payload.client.os}:${payload.client.deviceName}:${payload.client.appName}`;
-      console.error(details);
-      return {
-        ...state,
-        uninitializedClients: state.uninitializedClients
-          .map((c) =>
-            isEqual(c.client, payload.client)
-              ? {...c, errorMessage: errorMessage}
-              : c,
-          )
-          .sort((a, b) => a.client.appName.localeCompare(b.client.appName)),
-        errors: mergeError(state.errors, {
-          message: `Client setup error: ${errorMessage}`,
-          details,
-          error: payload.error instanceof Error ? payload.error : undefined,
-        }),
-      };
-    }
-    case 'DISMISS_ERROR': {
-      const errors = state.errors.slice();
-      errors.splice(action.payload, 1);
-      return {
-        ...state,
-        errors,
-      };
-    }
     case 'REGISTER_PLUGINS': {
       // plugins are registered after creating the base devices, so update them
       const plugins = action.payload;
@@ -409,26 +347,6 @@ export default (state: State = INITAL_STATE, action: Actions): State => {
   }
 };
 
-function mergeError(
-  errors: FlipperError[],
-  newError: FlipperError,
-): FlipperError[] {
-  const idx = errors.findIndex((error) => error.message === newError.message);
-  const results = errors.slice();
-  if (idx !== -1) {
-    results[idx] = {
-      ...newError,
-      occurrences: (errors[idx].occurrences || 0) + 1,
-    };
-  } else {
-    results.push({
-      ...newError,
-      occurrences: 1,
-    });
-  }
-  return results;
-}
-
 export const selectDevice = (payload: BaseDevice): Action => ({
   type: 'SELECT_DEVICE',
   payload,
@@ -472,11 +390,6 @@ export const starPlugin = (payload: {
   payload,
 });
 
-export const dismissError = (index: number): Action => ({
-  type: 'DISMISS_ERROR',
-  payload: index,
-});
-
 export const selectClient = (clientId: string): Action => ({
   type: 'SELECT_CLIENT',
   payload: clientId,
diff --git a/desktop/app/src/reducers/notifications.tsx b/desktop/app/src/reducers/notifications.tsx
index 9ee70bcf8..671b14922 100644
--- a/desktop/app/src/reducers/notifications.tsx
+++ b/desktop/app/src/reducers/notifications.tsx
@@ -9,6 +9,7 @@
 
 import {Notification} from '../plugin';
 import {Actions} from './';
+import {getStringFromErrorLike} from '../utils';
 export type PluginNotification = {
   notification: Notification;
   pluginId: string;
@@ -101,7 +102,16 @@ export default function reducer(
     case 'ADD_NOTIFICATION':
       return {
         ...state,
-        activeNotifications: [...state.activeNotifications, action.payload],
+        // while adding notifications, remove old duplicates
+        activeNotifications: [
+          ...state.activeNotifications.filter(
+            (notif) =>
+              notif.client !== action.payload.client ||
+              notif.pluginId !== action.payload.pluginId ||
+              notif.notification.id !== action.payload.notification.id,
+          ),
+          action.payload,
+        ],
       };
     default:
       return state;
@@ -156,6 +166,25 @@ export function addNotification(payload: PluginNotification): Action {
   };
 }
 
+export function addErrorNotification(
+  title: string,
+  message: string,
+  error?: any,
+): Action {
+  // TODO: use this method for https://github.com/facebook/flipper/pull/1478/files as well
+  console.error(title, message, error);
+  return addNotification({
+    client: null,
+    pluginId: 'globalError',
+    notification: {
+      id: title,
+      title,
+      message: error ? message + ' ' + getStringFromErrorLike(error) : message,
+      severity: 'error',
+    },
+  });
+}
+
 export function setActiveNotifications(payload: {
   notifications: Array<Notification>;
   client: null | string;