diff --git a/.gitignore b/.gitignore
index 0b8a0db40..de7972e5e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 # NPM
 /node_modules
 npm-*
+/package-lock.json
 
 # Testing
 /.nyc_output
diff --git a/package.json b/package.json
index 625e7a037..b272a080e 100644
--- a/package.json
+++ b/package.json
@@ -56,7 +56,7 @@
     "eslint": "^5.0.1",
     "eslint-config-scratch": "^5.0.0",
     "eslint-plugin-import": "^2.8.0",
-    "eslint-plugin-react": "^7.5.1",
+    "eslint-plugin-react": "7.11.1",
     "file-loader": "2.0.0",
     "get-float-time-domain-data": "0.1.0",
     "get-user-media-promise": "1.1.4",
@@ -103,14 +103,14 @@
     "redux-mock-store": "^1.2.3",
     "redux-throttle": "0.1.1",
     "rimraf": "^2.6.1",
-    "scratch-audio": "0.1.0-prerelease.20181023202904",
+    "scratch-audio": "0.1.0-prerelease.20190108181031",
     "scratch-blocks": "0.1.0-prerelease.1545364693",
     "scratch-l10n": "3.1.20181220222259",
     "scratch-paint": "0.2.0-prerelease.20181220194927",
-    "scratch-render": "0.1.0-prerelease.20181226153401",
+    "scratch-render": "0.1.0-prerelease.20190108175224",
     "scratch-storage": "1.2.2",
     "scratch-svg-renderer": "0.2.0-prerelease.20181220183040",
-    "scratch-vm": "0.2.0-prerelease.20181226213940",
+    "scratch-vm": "0.2.0-prerelease.20190107184530",
     "selenium-webdriver": "3.6.0",
     "startaudiocontext": "1.2.1",
     "style-loader": "^0.23.0",
diff --git a/src/components/backpack/backpack.css b/src/components/backpack/backpack.css
index 6c3d9fbc2..ad7644c64 100644
--- a/src/components/backpack/backpack.css
+++ b/src/components/backpack/backpack.css
@@ -57,7 +57,7 @@
     width: 100%;
     height: 100%;
     opacity: 0.75;
-    background-color: #8cbcff;
+    background-color: $drop-highlight;
     transition: all 0.25s ease;
 }
 
diff --git a/src/components/blocks/blocks.css b/src/components/blocks/blocks.css
index e0b07ce26..fd66c68bd 100644
--- a/src/components/blocks/blocks.css
+++ b/src/components/blocks/blocks.css
@@ -13,7 +13,7 @@
     width: 100%;
     height: 100%;
     opacity: 0.75;
-    background-color: #8cbcff;
+    background-color: $drop-highlight;
     transition: all 0.25s ease;
 }
 
diff --git a/src/components/browser-modal/browser-modal.jsx b/src/components/browser-modal/browser-modal.jsx
index 9afac0e38..95bfe416e 100644
--- a/src/components/browser-modal/browser-modal.jsx
+++ b/src/components/browser-modal/browser-modal.jsx
@@ -32,7 +32,7 @@ const BrowserModal = ({intl, ...props}) => (
                 <p>
                     { /* eslint-disable max-len */ }
                     <FormattedMessage
-                        defaultMessage="We're very sorry, but Scratch 3.0 does not support Internet Explorer, Vivaldi, Opera or Silk. We recommend trying a newer browser such as Google Chrome, Mozilla Firefox, or Microsoft Edge."
+                        defaultMessage="We are very sorry, but Scratch does not support this browser version. We recommend updating to the latest version of a supported browser such as Google Chrome, Mozilla Firefox, Microsoft Edge, or Apple Safari."
                         description="Unsupported browser description"
                         id="gui.unsupportedBrowser.description"
                     />
diff --git a/src/components/sound-editor/sound-editor.css b/src/components/sound-editor/sound-editor.css
index 4a0e03655..279875fc8 100644
--- a/src/components/sound-editor/sound-editor.css
+++ b/src/components/sound-editor/sound-editor.css
@@ -79,6 +79,7 @@ $border-radius: 0.25rem;
     font-size: 0.85rem;
     transition: 0.2s;
     user-select: none;
+    margin: 0px;
 }
 
 .button > img {
diff --git a/src/components/sprite-selector/sprite-list.jsx b/src/components/sprite-selector/sprite-list.jsx
index 17ba2dc21..de727969e 100644
--- a/src/components/sprite-selector/sprite-list.jsx
+++ b/src/components/sprite-selector/sprite-list.jsx
@@ -34,62 +34,68 @@ const SpriteList = function (props) {
 
     return (
         <Box
-            className={styles.itemsWrapper}
+            className={classNames(styles.scrollWrapper, {
+                [styles.scrollWrapperDragging]: draggingType === DragConstants.BACKPACK_SPRITE
+            })}
             componentRef={containerRef}
         >
-            {items.map((sprite, index) => {
+            <Box
+                className={styles.itemsWrapper}
+            >
+                {items.map((sprite, index) => {
 
-                // If the sprite has just received a block drop, used for green highlight
-                const receivedBlocks = (
-                    hoveredTarget.sprite === sprite.id &&
+                    // If the sprite has just received a block drop, used for green highlight
+                    const receivedBlocks = (
+                        hoveredTarget.sprite === sprite.id &&
                     sprite.id !== editingTarget &&
                     hoveredTarget.receivedBlocks
-                );
+                    );
 
-                // If the sprite is indicating it can receive block dropping, used for blue highlight
-                let isRaised = !receivedBlocks && raised && sprite.id !== editingTarget;
+                    // If the sprite is indicating it can receive block dropping, used for blue highlight
+                    let isRaised = !receivedBlocks && raised && sprite.id !== editingTarget;
 
-                // A sprite is also raised if a costume or sound is being dragged.
-                // Note the absence of the self-sharing check: a sprite can share assets with itself.
-                // This is a quirk of 2.0, but seems worth leaving possible, it
-                // allows quick (albeit unusual) duplication of assets.
-                isRaised = isRaised || [
-                    DragConstants.COSTUME,
-                    DragConstants.SOUND,
-                    DragConstants.BACKPACK_COSTUME,
-                    DragConstants.BACKPACK_SOUND,
-                    DragConstants.BACKPACK_CODE].includes(draggingType);
+                    // A sprite is also raised if a costume or sound is being dragged.
+                    // Note the absence of the self-sharing check: a sprite can share assets with itself.
+                    // This is a quirk of 2.0, but seems worth leaving possible, it
+                    // allows quick (albeit unusual) duplication of assets.
+                    isRaised = isRaised || [
+                        DragConstants.COSTUME,
+                        DragConstants.SOUND,
+                        DragConstants.BACKPACK_COSTUME,
+                        DragConstants.BACKPACK_SOUND,
+                        DragConstants.BACKPACK_CODE].includes(draggingType);
 
-                return (
-                    <SortableAsset
-                        className={classNames(styles.spriteWrapper, {
-                            [styles.placeholder]: isSpriteDrag && index === draggingIndex})}
-                        index={isSpriteDrag ? ordering.indexOf(index) : index}
-                        key={sprite.name}
-                        onAddSortable={onAddSortable}
-                        onRemoveSortable={onRemoveSortable}
-                    >
-                        <SpriteSelectorItem
-                            asset={sprite.costume && sprite.costume.asset}
-                            className={classNames(styles.sprite, {
-                                [styles.raised]: isRaised,
-                                [styles.receivedBlocks]: receivedBlocks
-                            })}
-                            dragPayload={sprite}
-                            dragType={DragConstants.SPRITE}
-                            id={sprite.id}
-                            index={index}
-                            key={sprite.id}
-                            name={sprite.name}
-                            selected={sprite.id === selectedId}
-                            onClick={onSelectSprite}
-                            onDeleteButtonClick={onDeleteSprite}
-                            onDuplicateButtonClick={onDuplicateSprite}
-                            onExportButtonClick={onExportSprite}
-                        />
-                    </SortableAsset>
-                );
-            })}
+                    return (
+                        <SortableAsset
+                            className={classNames(styles.spriteWrapper, {
+                                [styles.placeholder]: isSpriteDrag && index === draggingIndex})}
+                            index={isSpriteDrag ? ordering.indexOf(index) : index}
+                            key={sprite.name}
+                            onAddSortable={onAddSortable}
+                            onRemoveSortable={onRemoveSortable}
+                        >
+                            <SpriteSelectorItem
+                                asset={sprite.costume && sprite.costume.asset}
+                                className={classNames(styles.sprite, {
+                                    [styles.raised]: isRaised,
+                                    [styles.receivedBlocks]: receivedBlocks
+                                })}
+                                dragPayload={sprite}
+                                dragType={DragConstants.SPRITE}
+                                id={sprite.id}
+                                index={index}
+                                key={sprite.id}
+                                name={sprite.name}
+                                selected={sprite.id === selectedId}
+                                onClick={onSelectSprite}
+                                onDeleteButtonClick={onDeleteSprite}
+                                onDuplicateButtonClick={onDuplicateSprite}
+                                onExportButtonClick={onExportSprite}
+                            />
+                        </SortableAsset>
+                    );
+                })}
+            </Box>
         </Box>
     );
 };
diff --git a/src/components/sprite-selector/sprite-selector.css b/src/components/sprite-selector/sprite-selector.css
index 678f61ef4..ffade4750 100644
--- a/src/components/sprite-selector/sprite-selector.css
+++ b/src/components/sprite-selector/sprite-selector.css
@@ -55,6 +55,10 @@
     overflow-y: auto;
 }
 
+.scroll-wrapper-dragging {
+    background-color: $drop-highlight;
+}
+
 .items-wrapper {
     display: flex;
     flex-wrap: wrap;
@@ -80,12 +84,12 @@
 }
 
 .raised {
-    background-color: #8cbcff;
+    background-color: $drop-highlight;
     transition: all 0.25s ease;
 }
 
 .raised:hover {
-    background-color: #8cbcff;
+    background-color: $drop-highlight;
     transform: scale(1.05);
 }
 
@@ -94,7 +98,7 @@
     animation-duration: 500ms;
     animation-iteration-count: 1;
     animation-timing-function: ease-in-out;
-    background-color: #8cbcff;
+    background-color: $drop-highlight;
 }
 
 @keyframes wiggle {
diff --git a/src/components/sprite-selector/sprite-selector.jsx b/src/components/sprite-selector/sprite-selector.jsx
index 981e44b0f..115eaee95 100644
--- a/src/components/sprite-selector/sprite-selector.jsx
+++ b/src/components/sprite-selector/sprite-selector.jsx
@@ -100,20 +100,18 @@ const SpriteSelectorComponent = function (props) {
                 onChangeY={onChangeSpriteY}
             />
 
-            <Box className={styles.scrollWrapper}>
-                <SpriteList
-                    editingTarget={editingTarget}
-                    hoveredTarget={hoveredTarget}
-                    items={Object.keys(sprites).map(id => sprites[id])}
-                    raised={raised}
-                    selectedId={selectedId}
-                    onDeleteSprite={onDeleteSprite}
-                    onDrop={onDrop}
-                    onDuplicateSprite={onDuplicateSprite}
-                    onExportSprite={onExportSprite}
-                    onSelectSprite={onSelectSprite}
-                />
-            </Box>
+            <SpriteList
+                editingTarget={editingTarget}
+                hoveredTarget={hoveredTarget}
+                items={Object.keys(sprites).map(id => sprites[id])}
+                raised={raised}
+                selectedId={selectedId}
+                onDeleteSprite={onDeleteSprite}
+                onDrop={onDrop}
+                onDuplicateSprite={onDuplicateSprite}
+                onExportSprite={onExportSprite}
+                onSelectSprite={onSelectSprite}
+            />
             <ActionMenu
                 className={styles.addButton}
                 img={spriteIcon}
diff --git a/src/components/stage-selector/stage-selector.css b/src/components/stage-selector/stage-selector.css
index 8136911e8..742898bd3 100644
--- a/src/components/stage-selector/stage-selector.css
+++ b/src/components/stage-selector/stage-selector.css
@@ -100,7 +100,7 @@ $header-height: calc($stage-menu-height - 2px);
 }
 
 .raised, .raised .header {
-    background-color: #8cbcff;
+    background-color: $drop-highlight;
     transition: all 0.25s ease;
 }
 
diff --git a/src/components/stage/stage.css b/src/components/stage/stage.css
index 7e0a59c2e..6ceb4c7e9 100644
--- a/src/components/stage/stage.css
+++ b/src/components/stage/stage.css
@@ -9,9 +9,9 @@
     */
     display: block;
 
-    /* Attach border radius directly to canvas to prevent needing overflow:hidden; */
     border-radius: $space;
     border: $stage-standard-border-width solid $ui-black-transparent;
+    overflow: hidden;
 
     /* @todo: This is for overriding the value being set somewhere. Where is it being set? */
     background-color: transparent;
diff --git a/src/components/stage/stage.jsx b/src/components/stage/stage.jsx
index f87a39b79..1a2837360 100644
--- a/src/components/stage/stage.jsx
+++ b/src/components/stage/stage.jsx
@@ -48,18 +48,25 @@ const StageComponent = props => {
                 }}
                 onDoubleClick={onDoubleClick}
             >
-                <DOMElementRenderer
+                <Box
                     className={classNames(
                         styles.stage,
                         {[styles.stageOverlayContent]: isFullScreen}
                     )}
-                    domElement={canvas}
                     style={{
                         height: stageDimensions.height,
                         width: stageDimensions.width
                     }}
-                    {...boxProps}
-                />
+                >
+                    <DOMElementRenderer
+                        domElement={canvas}
+                        style={{
+                            height: stageDimensions.height,
+                            width: stageDimensions.width
+                        }}
+                        {...boxProps}
+                    />
+                </Box>
                 <Box className={styles.monitorWrapper}>
                     <MonitorList
                         draggable={useEditorDragStyle}
diff --git a/src/css/colors.css b/src/css/colors.css
index 9caf8430d..185091812 100644
--- a/src/css/colors.css
+++ b/src/css/colors.css
@@ -40,3 +40,5 @@ $extensions-primary: hsla(163, 85%, 40%, 1); /* #0FBD8C */
 $extensions-tertiary: hsla(163, 85%, 30%, 1); /* #0B8E69 */
 $extensions-transparent: hsla(163, 85%, 40%, 0.35); /* 35% transparent version of extensions-primary */
 $extensions-light: hsla(163, 57%, 85%, 1); /* opaque version of extensions-transparent, on white bg */
+
+$drop-highlight: hsla(215, 100%, 77%); /* lighter than motion-primary */
diff --git a/src/lib/font-loader-hoc.jsx b/src/lib/font-loader-hoc.jsx
index ea05143b9..9e98cf127 100644
--- a/src/lib/font-loader-hoc.jsx
+++ b/src/lib/font-loader-hoc.jsx
@@ -4,6 +4,17 @@ import omit from 'lodash.omit';
 import {connect} from 'react-redux';
 import {setFontsLoaded} from '../reducers/fonts-loaded';
 
+// This list is from scratch-render-fonts:
+// https://github.com/LLK/scratch-render-fonts/blob/master/src/index.js#L4
+const FONTS = [
+    'Sans Serif',
+    'Serif',
+    'Handwriting',
+    'Marker',
+    'Curly',
+    'Pixel',
+    'Scratch'
+];
 /* Higher Order Component to provide behavior for loading fonts.
  * @param {React.Component} WrappedComponent component to receive fontsLoaded prop
  * @returns {React.Component} component with font loading behavior
@@ -22,8 +33,12 @@ const FontLoaderHOC = function (WrappedComponent) {
                     typeof document.fonts.values === 'function' &&
                     typeof document.fonts.values()[Symbol.iterator] === 'function') {
                     for (const fontFace of document.fonts.values()) {
-                        fontPromises.push(fontFace.loaded);
-                        fontFace.load();
+                        // Only load fonts from this list. If we load all fonts on the document, we may block on
+                        // loading fonts from things like chrome extensions.
+                        if (FONTS.indexOf(fontFace.family) !== -1) {
+                            fontPromises.push(fontFace.loaded);
+                            fontFace.load();
+                        }
                     }
                 }
                 return fontPromises;
diff --git a/src/lib/project-saver-hoc.jsx b/src/lib/project-saver-hoc.jsx
index addfd6eb0..1bbafef43 100644
--- a/src/lib/project-saver-hoc.jsx
+++ b/src/lib/project-saver-hoc.jsx
@@ -210,6 +210,13 @@ const ProjectSaverHOC = function (WrappedComponent) {
         storeProject (projectId, requestParams) {
             requestParams = requestParams || {};
             this.clearAutoSaveTimeout();
+            // Serialize VM state now before embarking on
+            // the asynchronous journey of storing assets to
+            // the server. This ensures that assets don't update
+            // while in the process of saving a project (e.g. the
+            // serialized project refers to a newer asset than what
+            // we just finished saving).
+            const savedVMState = this.props.vm.toJSON();
             return Promise.all(this.props.vm.assets
                 .filter(asset => !asset.clean)
                 .map(
@@ -224,7 +231,7 @@ const ProjectSaverHOC = function (WrappedComponent) {
                 )
             ).then(() => {
                 const opts = {
-                    body: this.props.vm.toJSON(),
+                    body: savedVMState,
                     // If we set json:true then the body is double-stringified, so don't
                     headers: {
                         'Content-Type': 'application/json'
diff --git a/src/lib/screen-utils.js b/src/lib/screen-utils.js
index d61201784..a94a67d5b 100644
--- a/src/lib/screen-utils.js
+++ b/src/lib/screen-utils.js
@@ -69,6 +69,10 @@ const getStageDimensions = (stageSize, isFullScreen) => {
         stageDimensions.width = stageDimensions.scale * stageDimensions.widthDefault;
     }
 
+    // Round off dimensions to prevent resampling/blurriness
+    stageDimensions.height = Math.round(stageDimensions.height);
+    stageDimensions.width = Math.round(stageDimensions.width);
+
     return stageDimensions;
 };
 
diff --git a/src/lib/supported-browser.js b/src/lib/supported-browser.js
index caeac5fe3..adf449d01 100644
--- a/src/lib/supported-browser.js
+++ b/src/lib/supported-browser.js
@@ -6,11 +6,18 @@ import bowser from 'bowser';
  */
 export default function () {
     if (bowser.msie ||
-        bowser.vivaldi ||
         bowser.opera ||
         bowser.silk) {
         return false;
     }
-    // @todo Should also test for versions of supported browsers
-    return true;
+    // IMPORTANT: If you change versions here, also change them in www
+    // minimum versions for recommended browsers
+    const minVersions = {
+        chrome: '63',
+        msedge: '15',
+        firefox: '57',
+        safari: '11'
+    };
+    // strict mode == false so any browser not mentioned in the min Versions is ok
+    return bowser.check(minVersions, false);
 }