diff --git a/frontend/app/components/Session/IOSPlayer/Performance.js b/frontend/app/components/Session/IOSPlayer/Performance.js
index 42d19888f..92957d8fe 100644
--- a/frontend/app/components/Session/IOSPlayer/Performance.js
+++ b/frontend/app/components/Session/IOSPlayer/Performance.js
@@ -44,7 +44,7 @@ export default observer(({ player }) => {
 	      <Performance 
 					performanceChartTime={ current ? current.tmie : 0 }
 				  performanceChartData={ player.lists[PERFORMANCE].list }
-				  avaliability={ player.lists[PERFORMANCE].availability }
+				  availability={ player.lists[PERFORMANCE].availability }
 				  hiddenScreenMarker={ false }
 				  player={ player }
 				/>
diff --git a/frontend/app/components/Session/Layout/ToolPanel/Performance.tsx b/frontend/app/components/Session/Layout/ToolPanel/Performance.tsx
index c5ae6f809..c00d39a95 100644
--- a/frontend/app/components/Session/Layout/ToolPanel/Performance.tsx
+++ b/frontend/app/components/Session/Layout/ToolPanel/Performance.tsx
@@ -220,12 +220,12 @@ export default class Performance extends React.PureComponent {
   render() {
     const { 
       performanceChartTime,
-      avaliability = {},
+      availability = {},
       hiddenScreenMarker = true,
     } = this.props;
-    const { fps, cpu, heap, nodes, memory, battery } = avaliability;
-    const avaliableCount = [ fps, cpu, heap, nodes, memory, battery ].reduce((c, av) => av ? c + 1 : c, 0);
-    const height = avaliableCount === 0 ? "0" : `${100 / avaliableCount}%`;
+    const { fps, cpu, heap, nodes, memory, battery } = availability;
+    const availableCount = [ fps, cpu, heap, nodes, memory, battery ].reduce((c, av) => av ? c + 1 : c, 0);
+    const height = availableCount === 0 ? "0" : `${100 / availableCount}%`;
 
     return (
       <>
diff --git a/frontend/app/components/Session_/Performance/Performance.tsx b/frontend/app/components/Session_/Performance/Performance.tsx
index 2d251a9fd..330defb26 100644
--- a/frontend/app/components/Session_/Performance/Performance.tsx
+++ b/frontend/app/components/Session_/Performance/Performance.tsx
@@ -187,7 +187,7 @@ function Performance({
     performanceChartData,
     connType,
     connBandwidth,
-    performanceAvaliability: avaliability,
+    performanceAvailability: availability,
   } = store.get();
 
   React.useState(() => {
@@ -212,9 +212,9 @@ function Performance({
     }
   };
 
-  const { fps, cpu, heap, nodes } = avaliability;
-  const avaliableCount = [fps, cpu, heap, nodes].reduce((c, av) => (av ? c + 1 : c), 0);
-  const height = avaliableCount === 0 ? '0' : `${100 / avaliableCount}%`;
+  const { fps, cpu, heap, nodes } = availability;
+  const availableCount = [fps, cpu, heap, nodes].reduce((c, av) => (av ? c + 1 : c), 0);
+  const height = availableCount === 0 ? '0' : `${100 / availableCount}%`;
 
   return (
     <BottomBlock>
diff --git a/frontend/app/player/web/MessageManager.ts b/frontend/app/player/web/MessageManager.ts
index 104a9365a..9cb4a3edf 100644
--- a/frontend/app/player/web/MessageManager.ts
+++ b/frontend/app/player/web/MessageManager.ts
@@ -52,7 +52,7 @@ export interface State extends ScreenState, ListsState {
   connBandwidth?: number,
   location?: string,
   performanceChartTime?: number,
-  performanceAvaliability?: PerformanceTrackManager['avaliability']
+  performanceAvailability?: PerformanceTrackManager['availability']
 
   domContentLoadedTime?:  { time: number, value: number },
   domBuildingTime?: number,
@@ -191,7 +191,7 @@ export default class MessageManager {
   private onFileReadSuccess = () => {
     const stateToUpdate : Partial<State>= {
       performanceChartData: this.performanceTrackManager.chartData,
-      performanceAvaliability: this.performanceTrackManager.avaliability,
+      performanceAvailability: this.performanceTrackManager.availability,
       ...this.lists.getFullListsState(),
     }
     if (this.activityManager) {
@@ -250,33 +250,58 @@ export default class MessageManager {
 
     this.waitingForFiles = true
 
+    // TODO: refactor this stuff; split everything to async/await
+    
     const loadMethod = this.session.domURL && this.session.domURL.length > 0
       ? { url: this.session.domURL, parser: () => createNewParser(true, 'dom') }
       : { url: this.session.mobsUrl, parser: () => createNewParser(false, 'dom')}
 
-    loadFiles(loadMethod.url, loadMethod.parser())
-      // EFS fallback
-      .catch((e) => requestEFSDom(this.session.sessionId)
+    const parser = loadMethod.parser()
+
+    /**
+     * We load first dom mobfile before the rest
+     * to speed up time to replay
+     * but as a tradeoff we have to have some copy-paste
+     * for the devtools file
+     * */
+    loadFiles([loadMethod.url[0]], parser)
+      .then(() => {
+        if (loadMethod.url.length > 1) {
+          loadFiles([loadMethod.url[1]], parser, true)
+        }
+        if (!isClickmap) {
+          this.loadDevtools(createNewParser)
+        }
+      })
+      /**
+       * EFS fallback for unprocessed sessions (which are live)
+       * */
+      .catch(() => {
+          requestEFSDom(this.session.sessionId)
             .then(createNewParser(false, 'domEFS'))
+            .catch(this.onFileReadFailed)
+          if (!isClickmap) {
+            this.loadDevtools(createNewParser)
+          }
+        }
       )
       .then(this.onFileReadSuccess)
-      .catch(this.onFileReadFailed)
       .finally(this.onFileReadFinally);
+  }
 
-    // load devtools (TODO: start after the first DOM file download)
-    if (isClickmap) return;
+  loadDevtools(createNewParser: (shouldDecrypt: boolean, file: string) => (b: Uint8Array) => Promise<void>) {
     this.state.update({ devtoolsLoading: true })
     loadFiles(this.session.devtoolsURL, createNewParser(true, 'devtools'))
-    // EFS fallback
-    .catch(() =>
-      requestEFSDevtools(this.session.sessionId)
-        .then(createNewParser(false, 'devtoolsEFS'))
-    )
-    .then(() => {
-      this.state.update(this.lists.getFullListsState()) // TODO: also in case of dynamic update through assist
-    })
-    .catch(e => logger.error("Can not download the devtools file", e))
-    .finally(() => this.state.update({ devtoolsLoading: false }))
+      // EFS fallback
+      .catch(() =>
+        requestEFSDevtools(this.session.sessionId)
+          .then(createNewParser(false, 'devtoolsEFS'))
+      )
+      .then(() => {
+        this.state.update(this.lists.getFullListsState()) // TODO: also in case of dynamic update through assist
+      })
+      .catch(e => logger.error("Can not download the devtools file", e))
+      .finally(() => this.state.update({ devtoolsLoading: false }))
   }
 
   resetMessageManagers() {
diff --git a/frontend/app/player/web/managers/PerformanceTrackManager.ts b/frontend/app/player/web/managers/PerformanceTrackManager.ts
index 98ce2c0b9..bec1652c3 100644
--- a/frontend/app/player/web/managers/PerformanceTrackManager.ts
+++ b/frontend/app/player/web/managers/PerformanceTrackManager.ts
@@ -15,9 +15,9 @@ export default class PerformanceTrackManager extends ListWalker<PerformanceTrack
 	private chart: Array<PerformanceChartPoint> = [];
 	private isHidden: boolean = false;
 	private timeCorrection: number = 0;
-	private heapAvaliable: boolean = false;
-	private fpsAvaliable: boolean = false;
-	private cpuAvaliable: boolean = false;
+	private heapAvailable: boolean = false;
+	private fpsAvailable: boolean = false;
+	private cpuAvailable: boolean = false;
 	private prevTime: number | null = null;
 	private prevNodesCount: number = 0;
 
@@ -29,7 +29,7 @@ export default class PerformanceTrackManager extends ListWalker<PerformanceTrack
 			let timePassed = msg.time - this.prevTime + this.timeCorrection;
 
 			if (timePassed > 0 && msg.frames >= 0) {
-				if (msg.frames > 0) { this.fpsAvaliable = true; }
+				if (msg.frames > 0) { this.fpsAvailable = true; }
 				fps = msg.frames*1e3/timePassed; // Multiply by 1e3 as time in ms;
 				fps = Math.min(fps,60); // What if 120?  TODO: alert if more than 60
 				if (this.chart.length === 1) {
@@ -38,7 +38,7 @@ export default class PerformanceTrackManager extends ListWalker<PerformanceTrack
 			}
 
 			if (timePassed > 0 && msg.ticks >= 0) {
-				this.cpuAvaliable = true;
+				this.cpuAvailable = true;
 				let tickRate = msg.ticks * 30 / timePassed;
 				if (tickRate > 1) {
 					tickRate = 1;
@@ -53,7 +53,7 @@ export default class PerformanceTrackManager extends ListWalker<PerformanceTrack
 		this.prevTime = msg.time;
 		this.timeCorrection = 0
 
-		this.heapAvaliable = this.heapAvaliable || msg.usedJSHeapSize > 0;
+		this.heapAvailable = this.heapAvailable || msg.usedJSHeapSize > 0;
 		this.chart.push({
 			usedHeap: msg.usedJSHeapSize,
 			totalHeap: msg.totalJSHeapSize,
@@ -109,11 +109,11 @@ export default class PerformanceTrackManager extends ListWalker<PerformanceTrack
 		return this.chart;
 	}
 
-	get avaliability(): { cpu: boolean, fps: boolean, heap: boolean, nodes: boolean } {
+	get availability(): { cpu: boolean, fps: boolean, heap: boolean, nodes: boolean } {
 		return {
-			cpu: this.cpuAvaliable,
-			fps: this.fpsAvaliable,
-			heap: this.heapAvaliable,
+			cpu: this.cpuAvailable,
+			fps: this.fpsAvailable,
+			heap: this.heapAvailable,
 			nodes: true,
 		}
 	}
diff --git a/frontend/app/player/web/network/loadFiles.ts b/frontend/app/player/web/network/loadFiles.ts
index 888fd257f..49d47f801 100644
--- a/frontend/app/player/web/network/loadFiles.ts
+++ b/frontend/app/player/web/network/loadFiles.ts
@@ -8,14 +8,15 @@ export const NO_URLS = 'No-urls-provided'
 export async function loadFiles(
   urls: string[],
   onData: (data: Uint8Array) => void,
-): Promise<any> {
+  canSkip: boolean = false,
+): Promise<void> {
   if (!urls.length) {
     throw NO_URLS
   }
   try {
     for (let url of urls) {
       const response = await window.fetch(url)
-      const data = await processAPIStreamResponse(response, url !== urls[0])
+      const data = await processAPIStreamResponse(response, urls.length > 1 ? url !== urls[0] : canSkip)
       onData(data)
     }
   } catch(e) {