diff --git a/background.js b/background.js
index 567dbfd3..14e57d53 100644
--- a/background.js
+++ b/background.js
@@ -62,10 +62,10 @@ chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
 			&& sender.tab.url == request.matchUrl) {
 				updateIcon(sender.tab, styles);
 			}
-			return true;
+			return KEEP_CHANNEL_OPEN;
 		case "saveStyle":
-			saveStyle(request, sendResponse);
-			return true;
+			saveStyle(request).then(sendResponse);
+			return KEEP_CHANNEL_OPEN;
 		case "invalidateCache":
 			if (typeof invalidateCache != "undefined") {
 				invalidateCache(false);
@@ -73,7 +73,7 @@ chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
 			break;
 		case "healthCheck":
 			getDatabase(function() { sendResponse(true); }, function() { sendResponse(false); });
-			return true;
+			return KEEP_CHANNEL_OPEN;
 		case "openURL":
 			openURL(request);
 			break;
@@ -88,6 +88,9 @@ chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
 				chrome.contextMenus.update("disableAll", {checked: request.value});
 			}
 			break;
+		case "refreshAllTabs":
+			refreshAllTabs().then(sendResponse);
+			return KEEP_CHANNEL_OPEN;
 	}
 });
 
diff --git a/backup/fileSaveLoad.js b/backup/fileSaveLoad.js
index 0f481ee4..8d5415a3 100644
--- a/backup/fileSaveLoad.js
+++ b/backup/fileSaveLoad.js
@@ -1,4 +1,4 @@
-/* globals getStyles, saveStyle */
+/* globals getStyles, saveStyle, invalidateCache, refreshAllTabs, handleUpdate */
 'use strict';
 
 var STYLISH_DUMP_FILE_EXT = '.txt';
@@ -71,27 +71,26 @@ document.getElementById('file-all-styles').addEventListener('click', function ()
   });
 });
 
-document.getElementById('unfile-all-styles').addEventListener('click', function () {
-  loadFromFile(STYLISH_DUMPFILE_EXTENSION).then(function (rawText) {
-    var json = JSON.parse(rawText);
-    var i = 0, nextStyle;
+document.getElementById('unfile-all-styles').addEventListener('click', () => {
+  loadFromFile(STYLISH_DUMPFILE_EXTENSION).then(rawText => {
+    const json = JSON.parse(rawText);
+    const numStyles = json.length;
 
-    function done() {
-      window.alert(i + ' styles installed/updated');
-      location.reload();
-    }
+    invalidateCache(true);
+    proceed();
 
     function proceed() {
-      nextStyle = json[i++];
+      const nextStyle = json.shift();
       if (nextStyle) {
-        saveStyle(nextStyle, proceed);
-      }
-      else {
-        i--;
-        done();
+        saveStyle(nextStyle, {notify: false}).then(style => {
+          handleUpdate(style);
+          setTimeout(proceed, 0);
+        });
+      } else {
+        refreshAllTabs().then(() => {
+          setTimeout(alert, 100, numStyles + ' styles installed/updated');
+        });
       }
     }
-
-    proceed();
   });
 });
diff --git a/manage.js b/manage.js
index 465ca650..97f826fe 100644
--- a/manage.js
+++ b/manage.js
@@ -19,9 +19,7 @@ function showStyles(styles) {
 		return;
 	}
 	styles.sort(function(a, b) { return a.name.localeCompare(b.name)});
-	styles.map(createStyleElement).forEach(function(e) {
-		installed.appendChild(e);
-	});
+	styles.forEach(handleUpdate);
 	if (history.state) {
 		window.scrollTo(0, history.state.scrollY);
 	}
@@ -163,10 +161,8 @@ function getStyleElement(event) {
 chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
 	switch (request.method) {
 		case "styleUpdated":
-			handleUpdate(request.style);
-			break;
 		case "styleAdded":
-			installed.appendChild(createStyleElement(request.style));
+			handleUpdate(request.style);
 			break;
 		case "styleDeleted":
 			handleDelete(request.id);
@@ -176,12 +172,17 @@ chrome.runtime.onMessage.addListener(function(request, sender, sendResponse) {
 
 function handleUpdate(style) {
 	var element = createStyleElement(style);
-	installed.replaceChild(element, installed.querySelector("[style-id='" + style.id + "']"));
+	var oldElement = installed.querySelector(`[style-id="${style.id}"]`);
+	if (!oldElement) {
+		installed.appendChild(element);
+		return;
+	}
+	installed.replaceChild(element, oldElement);
 	if (style.id == lastUpdatedStyleId) {
 		lastUpdatedStyleId = null;
-		element.className = element.className += " update-done";
-		element.querySelector(".update-note").innerHTML = t('updateCompleted');
-	};
+		element.className = element.className += ' update-done';
+		element.querySelector('.update-note').innerHTML = t('updateCompleted');
+	}
 }
 
 function handleDelete(id) {
@@ -465,41 +466,6 @@ function initFilter(className, node) {
 	onFilterChange(className, {target: node});
 }
 
-function importStyles (e) {
-	var file = e.target.files[0];
-	var reader = new FileReader();
-	var styles = [];
-
-	function save () {
-		var style = styles.shift();
-		if (style) {
-			delete style.id;
-			saveStyle(style, save);
-		}
-		else {
-			window.location.reload()
-		}
-	}
-
-  reader.onloadend = function (evt) {
-    try {
-    	styles = JSON.parse(evt.target.result);
-    	save();
-    }
-    catch (e) {
-    	window.alert(e.message);
-    }
-  };
-  reader.onerror = function (e) {
-  	window.alert(e.message);
-  }
-  reader.readAsText(file)
-}
-
-function selectAll () {
-	document.execCommand('selectAll');
-}
-
 document.addEventListener("DOMContentLoaded", function() {
 	installed = document.getElementById("installed");
 	if (document.stylishStyles) {
@@ -520,5 +486,4 @@ document.addEventListener("DOMContentLoaded", function() {
 	]);
 	initFilter("enabled-only", document.getElementById("manage.onlyEnabled"));
 	initFilter("edited-only", document.getElementById("manage.onlyEdited"));
-
 });
diff --git a/messaging.js b/messaging.js
index 1f818ab3..1e7cc94e 100644
--- a/messaging.js
+++ b/messaging.js
@@ -1,3 +1,6 @@
+// keep message channel open for sendResponse in chrome.runtime.onMessage listener
+const KEEP_CHANNEL_OPEN = true;
+
 function notifyAllTabs(request) {
 	chrome.windows.getAll({populate: true}, function(windows) {
 		windows.forEach(function(win) {
@@ -16,6 +19,29 @@ function notifyAllTabs(request) {
 	}
 }
 
+function refreshAllTabs() {
+	return new Promise(resolve => {
+		chrome.windows.getAll({populate: true}, windows => {
+			windows.forEach((win, winIndex) => {
+				win.tabs.forEach((tab, tabIndex) => {
+					getStyles({matchUrl: tab.url, enabled: true, asHash: true}, styles => {
+						const message = {method: 'styleReplaceAll', styles};
+						if (tab.url == location.href && typeof applyOnMessage !== 'undefined') {
+							applyOnMessage(message);
+						} else {
+							chrome.tabs.sendMessage(tab.id, message);
+						}
+						updateIcon(tab, styles);
+						if (winIndex == windows.length - 1 && tabIndex == win.tabs.length - 1) {
+							resolve();
+						}
+					});
+				});
+			});
+		});
+	});
+}
+
 function updateIcon(tab, styles) {
 	// while NTP is still loading only process the request for its main frame with a real url
 	// (but when it's loaded we should process style toggle requests from popups, for example)
diff --git a/storage.js b/storage.js
index d375525c..8ff97738 100644
--- a/storage.js
+++ b/storage.js
@@ -95,72 +95,65 @@ function filterStyles(styles, options) {
 	return styles;
 }
 
-function saveStyle(o, callback) {
-	getDatabase(function(db) {
-		var tx = db.transaction(["styles"], "readwrite");
-		var os = tx.objectStore("styles");
+function saveStyle(style, {notify = true} = {}) {
+	return new Promise(resolve => {
+		getDatabase(db => {
+			const tx = db.transaction(['styles'], 'readwrite');
+			const os = tx.objectStore('styles');
 
-		// Update
-		if (o.id) {
-			var request = os.get(Number(o.id));
-			request.onsuccess = function(event) {
-				var style = request.result || {};
-				for (var prop in o) {
-					if (prop == "id") {
-						continue;
-					}
-					style[prop] = o[prop];
-				}
-				request = os.put(style);
-				request.onsuccess = function(event) {
-					notifyAllTabs({method: "styleUpdated", style: style});
-					invalidateCache(true);
-					if (callback) {
-						callback(style);
-					}
+			// Update
+			if (style.id) {
+				style.id = Number(style.id);
+				os.get(style.id).onsuccess = eventGet => {
+					style = Object.assign({}, eventGet.target.result, style);
+					os.put(style).onsuccess = eventPut => {
+						style.id = style.id || eventPut.target.result;
+						if (notify) {
+							notifyAllTabs({method: 'styleUpdated', style});
+						}
+						invalidateCache(notify);
+						resolve(style);
+					};
 				};
-			};
-			return;
-		}
-
-		// Create
-		// Set optional things to null if they're undefined
-		["updateUrl", "md5Url", "url", "originalMd5"].filter(function(att) {
-			return !(att in o);
-		}).forEach(function(att) {
-			o[att] = null;
-		});
-		// Set other optional things to empty array if they're undefined
-		o.sections.forEach(function(section) {
-			["urls", "urlPrefixes", "domains", "regexps"].forEach(function(property) {
-				if (!section[property]) {
-					section[property] = [];
-				}
-			});
-		});
-		// Set to enabled if not set
-		if (!("enabled" in o)) {
-			o.enabled = true;
-		}
-		// Make sure it's not null - that makes indexeddb sad
-		delete o["id"];
-		var request = os.add(o);
-		request.onsuccess = function(event) {
-			invalidateCache(true);
-			// Give it the ID that was generated
-			o.id = event.target.result;
-			notifyAllTabs({method: "styleAdded", style: o});
-			if (callback) {
-				callback(o);
+				return;
 			}
-		};
+
+			// Create
+			style = Object.assign({
+				// Set optional things if they're undefined
+				enabled: true,
+				updateUrl: null,
+				md5Url: null,
+				url: null,
+				originalMd5: null,
+			}, style, {
+				// Set other optional things to empty array if they're undefined
+				sections: style.sections.map(section =>
+					Object.assign({
+						urls: [],
+						urlPrefixes: [],
+						domains: [],
+						regexps: [],
+					}, section)
+				),
+			})
+			// Make sure it's not null - that makes indexeddb sad
+			delete style.id;
+			os.add(style).onsuccess = event => {
+				invalidateCache(true);
+				// Give it the ID that was generated
+				style.id = event.target.result;
+				notifyAllTabs({method: 'styleAdded', style});
+				resolve(style);
+			};
+		});
 	});
 }
 
 function enableStyle(id, enabled) {
-	saveStyle({id: id, enabled: enabled}, function(style) {
+	saveStyle({id: id, enabled: enabled}).then(style => {
 		handleUpdate(style);
-		notifyAllTabs({method: "styleUpdated", style: style});
+		notifyAllTabs({method: "styleUpdated", style});
 	});
 }
 
diff --git a/update.js b/update.js
index cf7e4645..e974471f 100644
--- a/update.js
+++ b/update.js
@@ -71,7 +71,7 @@ var update = {
             json.method = 'saveStyle';
             json.id = style.id;
 
-            saveStyle(json, function () {
+            saveStyle(json).then(style => {
               observe('single-updated', style.name);
             });
           }