diff --git a/src/BasePlatform.js b/src/BasePlatform.js
index abc9aa0bed..79f0d69e2c 100644
--- a/src/BasePlatform.js
+++ b/src/BasePlatform.js
@@ -3,6 +3,7 @@
 /*
 Copyright 2016 Aviral Dasgupta
 Copyright 2016 OpenMarket Ltd
+Copyright 2018 New Vector Ltd
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -105,11 +106,6 @@ export default class BasePlatform {
         return "Not implemented";
     }
 
-    isElectron(): boolean { return false; }
-
-    setupScreenSharingForIframe() {
-    }
-
     /**
      * Restarts the application, without neccessarily reloading
      * any application code
diff --git a/src/components/structures/UserSettings.js b/src/components/structures/UserSettings.js
index 6f932d71e1..b9dbe345c5 100644
--- a/src/components/structures/UserSettings.js
+++ b/src/components/structures/UserSettings.js
@@ -188,9 +188,11 @@ module.exports = React.createClass({
             phase: "UserSettings.LOADING", // LOADING, DISPLAY
             email_add_pending: false,
             vectorVersion: undefined,
+            canSelfUpdate: null,
             rejectingInvites: false,
             mediaDevices: null,
             ignoredUsers: [],
+            autoLaunchEnabled: null,
         };
     },
 
@@ -209,6 +211,13 @@ module.exports = React.createClass({
             }, (e) => {
                 console.log("Failed to fetch app version", e);
             });
+
+            PlatformPeg.get().canSelfUpdate().then((canUpdate) => {
+                if (this._unmounted) return;
+                this.setState({
+                    canSelfUpdate: canUpdate,
+                });
+            });
         }
 
         this._refreshMediaDevices();
@@ -227,11 +236,12 @@ module.exports = React.createClass({
         });
         this._refreshFromServer();
 
-        if (PlatformPeg.get().isElectron()) {
-            const {ipcRenderer} = require('electron');
-
-            ipcRenderer.on('settings', this._electronSettings);
-            ipcRenderer.send('settings_get');
+        if (PlatformPeg.get().supportsAutoLaunch()) {
+            PlatformPeg.get().getAutoLaunchEnabled().then(enabled => {
+                this.setState({
+                    autoLaunchEnabled: enabled,
+                });
+            });
         }
 
         this.setState({
@@ -262,11 +272,6 @@ module.exports = React.createClass({
         if (cli) {
             cli.removeListener("RoomMember.membership", this._onInviteStateChange);
         }
-
-        if (PlatformPeg.get().isElectron()) {
-            const {ipcRenderer} = require('electron');
-            ipcRenderer.removeListener('settings', this._electronSettings);
-        }
     },
 
     // `UserSettings` assumes that the client peg will not be null, so give it some
@@ -285,10 +290,6 @@ module.exports = React.createClass({
         });
     },
 
-    _electronSettings: function(ev, settings) {
-        this.setState({ electron_settings: settings });
-    },
-
     _refreshMediaDevices: function(stream) {
         if (stream) {
             // kill stream so that we don't leave it lingering around with webcam enabled etc
@@ -967,7 +968,7 @@ module.exports = React.createClass({
 
     _renderCheckUpdate: function() {
         const platform = PlatformPeg.get();
-        if ('canSelfUpdate' in platform && platform.canSelfUpdate() && 'startUpdateCheck' in platform) {
+        if (this.state.canSelfUpdate) {
             return <div>
                 <h3>{ _t('Updates') }</h3>
                 <div className="mx_UserSettings_section">
@@ -1012,8 +1013,7 @@ module.exports = React.createClass({
     },
 
     _renderElectronSettings: function() {
-        const settings = this.state.electron_settings;
-        if (!settings) return;
+        if (!PlatformPeg.get().supportsAutoLaunch()) return;
 
         // TODO: This should probably be a granular setting, but it only applies to electron
         // and ends up being get/set outside of matrix anyways (local system setting).
@@ -1023,7 +1023,7 @@ module.exports = React.createClass({
                 <div className="mx_UserSettings_toggle">
                     <input type="checkbox"
                            name="auto-launch"
-                           defaultChecked={settings['auto-launch']}
+                           defaultChecked={this.state.autoLaunchEnabled}
                            onChange={this._onAutoLaunchChanged}
                     />
                     <label htmlFor="auto-launch">{ _t('Start automatically after system login') }</label>
@@ -1033,8 +1033,11 @@ module.exports = React.createClass({
     },
 
     _onAutoLaunchChanged: function(e) {
-        const {ipcRenderer} = require('electron');
-        ipcRenderer.send('settings_set', 'auto-launch', e.target.checked);
+        PlatformPeg.get().setAutoLaunchEnabled(e.target.checked).then(() => {
+            this.setState({
+                autoLaunchEnabled: e.target.checked,
+            });
+        });
     },
 
     _mapWebRtcDevicesToSpans: function(devices) {
@@ -1393,7 +1396,7 @@ module.exports = React.createClass({
                 { this._renderBulkOptions() }
                 { this._renderBugReport() }
 
-                { PlatformPeg.get().isElectron() && this._renderElectronSettings() }
+                { this._renderElectronSettings() }
 
                 { this._renderAnalyticsControl() }
 
diff --git a/src/components/views/elements/AppTile.js b/src/components/views/elements/AppTile.js
index 23b24adbb4..7eae17ace8 100644
--- a/src/components/views/elements/AppTile.js
+++ b/src/components/views/elements/AppTile.js
@@ -49,7 +49,6 @@ export default class AppTile extends React.Component {
         this.state = this._getNewState(props);
 
         this._onAction = this._onAction.bind(this);
-        this._onMessage = this._onMessage.bind(this);
         this._onLoaded = this._onLoaded.bind(this);
         this._onEditClick = this._onEditClick.bind(this);
         this._onDeleteClick = this._onDeleteClick.bind(this);
@@ -143,10 +142,6 @@ export default class AppTile extends React.Component {
     }
 
     componentDidMount() {
-        // Legacy Jitsi widget messaging -- TODO replace this with standard widget
-        // postMessaging API
-        window.addEventListener('message', this._onMessage, false);
-
         // Widget action listeners
         this.dispatcherRef = dis.register(this._onAction);
     }
@@ -155,9 +150,6 @@ export default class AppTile extends React.Component {
         // Widget action listeners
         dis.unregister(this.dispatcherRef);
 
-        // Jitsi listener
-        window.removeEventListener('message', this._onMessage);
-
         // if it's not remaining on screen, get rid of the PersistedElement container
         if (!ActiveWidgetStore.getWidgetPersistence(this.props.id)) {
             ActiveWidgetStore.destroyPersistentWidget();
@@ -233,32 +225,6 @@ export default class AppTile extends React.Component {
         }
     }
 
-    // Legacy Jitsi widget messaging
-    // TODO -- This should be replaced with the new widget postMessaging API
-    _onMessage(event) {
-        if (this.props.type !== 'jitsi') {
-            return;
-        }
-        if (!event.origin) {
-            event.origin = event.originalEvent.origin;
-        }
-
-        const widgetUrlObj = url.parse(this.state.widgetUrl);
-        const eventOrigin = url.parse(event.origin);
-        if (
-            eventOrigin.protocol !== widgetUrlObj.protocol ||
-            eventOrigin.host !== widgetUrlObj.host
-        ) {
-            return;
-        }
-
-        if (event.data.widgetAction === 'jitsi_iframe_loaded') {
-            const iframe = this.refs.appFrame.contentWindow
-                .document.querySelector('iframe[id^="jitsiConferenceFrame"]');
-            PlatformPeg.get().setupScreenSharingForIframe(iframe);
-        }
-    }
-
     _canUserModify() {
         // User widgets should always be modifiable by their creator
         if (this.props.userWidget && MatrixClientPeg.get().credentials.userId === this.props.creatorUserId) {