diff --git a/src/components/button.ts b/src/components/button.ts
index f0d7940d..2fb996a4 100644
--- a/src/components/button.ts
+++ b/src/components/button.ts
@@ -7,8 +7,16 @@
 import { i18n, LangPackKey } from "../lib/langPack";
 import { ripple } from "./ripple";
 
-const Button = (className: string, options: Partial<{noRipple: true, onlyMobile: true, icon: string, rippleSquare: true, text: LangPackKey, disabled: boolean}> = {}) => {
-  const button = document.createElement('button');
+const Button = (className: string, options: Partial<{
+  noRipple: true, 
+  onlyMobile: true, 
+  icon: string, 
+  rippleSquare: true, 
+  text: LangPackKey, 
+  disabled: boolean,
+  asDiv: boolean
+}> = {}) => {
+  const button: HTMLButtonElement = document.createElement(options.asDiv ? 'div' : 'button') as any;
   button.className = className + (options.icon ? ' tgico-' + options.icon : '');
 
   if(!options.noRipple) {
@@ -24,7 +32,7 @@ const Button = (className: string, options: Partial<{noRipple: true, onlyMobile:
   }
 
   if(options.disabled) {
-    button.disabled = true;
+    button.setAttribute('disabled', 'true');
   }
 
   if(options.text) {
diff --git a/src/components/buttonIcon.ts b/src/components/buttonIcon.ts
index 6afd43fb..9cab3156 100644
--- a/src/components/buttonIcon.ts
+++ b/src/components/buttonIcon.ts
@@ -6,7 +6,7 @@
 
 import Button from "./button";
 
-const ButtonIcon = (className: string, options: Partial<{noRipple: true, onlyMobile: true}> = {}) => {
+const ButtonIcon = (className: string, options: Partial<{noRipple: true, onlyMobile: true, asDiv: boolean}> = {}) => {
   const button = Button('btn-icon', {icon: className, ...options});
   return button;
 };
diff --git a/src/components/buttonMenuToggle.ts b/src/components/buttonMenuToggle.ts
index 37066357..6911c415 100644
--- a/src/components/buttonMenuToggle.ts
+++ b/src/components/buttonMenuToggle.ts
@@ -10,7 +10,8 @@ import ButtonIcon from "./buttonIcon";
 import ButtonMenu, { ButtonMenuItemOptions } from "./buttonMenu";
 import { closeBtnMenu, openBtnMenu } from "./misc";
 
-const ButtonMenuToggle = (options: Partial<{noRipple: true, onlyMobile: true, listenerSetter: ListenerSetter}> = {}, direction: 'bottom-left' | 'bottom-right' | 'top-left' | 'top-right', buttons: ButtonMenuItemOptions[], onOpen?: (e: Event) => void) => {
+const ButtonMenuToggle = (options: Partial<{noRipple: true, onlyMobile: true, listenerSetter: ListenerSetter, asDiv: boolean}> = {}, direction: 'bottom-left' | 'bottom-right' | 'top-left' | 'top-right', buttons: ButtonMenuItemOptions[], onOpen?: (e: Event) => void) => {
+  options.asDiv = true;
   const button = ButtonIcon('more btn-menu-toggle', options);
 
   const btnMenu = ButtonMenu(buttons, options.listenerSetter);
diff --git a/src/components/ripple.ts b/src/components/ripple.ts
index ed2450a7..7f3bec53 100644
--- a/src/components/ripple.ts
+++ b/src/components/ripple.ts
@@ -129,6 +129,11 @@ export function ripple(elem: HTMLElement, callback: (id: number) => Promise<bool
     //});
   };
 
+  const isRippleUnneeded = (e: Event) => e.target !== elem && (
+      ['BUTTON', 'A'].includes((e.target as HTMLElement).tagName) 
+      || findUpClassName(e.target as HTMLElement, 'c-ripple') !== r
+    );
+
   // TODO: rename this variable
   let touchStartFired = false;
   if(isTouchSupported) {
@@ -142,10 +147,7 @@ export function ripple(elem: HTMLElement, callback: (id: number) => Promise<bool
       }
 
       //console.log('ripple touchstart', e);
-      if(e.touches.length > 1 
-        || touchStartFired 
-        || (['BUTTON', 'A'].includes((e.target as HTMLElement).tagName) && e.target !== elem) 
-        || findUpClassName(e.target as HTMLElement, 'c-ripple') !== r) {
+      if(e.touches.length > 1 || touchStartFired || isRippleUnneeded(e)) {
         return;
       }
       
@@ -174,17 +176,17 @@ export function ripple(elem: HTMLElement, callback: (id: number) => Promise<bool
       }
       //console.log('ripple mousedown', e, e.target, findUpClassName(e.target as HTMLElement, 'c-ripple') === r);
 
-      if(elem.dataset.ripple === '0' || findUpClassName(e.target as HTMLElement, 'c-ripple') !== r || (e.target as HTMLElement).tagName === 'A') {
-        return false;
+      if(elem.dataset.ripple === '0' || isRippleUnneeded(e)) {
+        return;
       } else if(touchStartFired) {
         touchStartFired = false;
-        return false;
+        return;
       }
   
       let {clientX, clientY} = e;
       drawRipple(clientX, clientY);
-      window.addEventListener('mouseup', handler, {once: true});
-      window.addEventListener('contextmenu', handler, {once: true});
-    });
+      window.addEventListener('mouseup', handler, {once: true, passive: true});
+      window.addEventListener('contextmenu', handler, {once: true, passive: true});
+    }, {passive: true});
   }
 }
diff --git a/src/components/sidebarRight/tabs/sharedMedia.ts b/src/components/sidebarRight/tabs/sharedMedia.ts
index a8c4e26c..bd68a281 100644
--- a/src/components/sidebarRight/tabs/sharedMedia.ts
+++ b/src/components/sidebarRight/tabs/sharedMedia.ts
@@ -44,6 +44,7 @@ import PopupPickUser from "../../popups/pickUser";
 import PopupPeer from "../../popups/peer";
 import Scrollable from "../../scrollable";
 import { isTouchSupported } from "../../../helpers/touchSupport";
+import { isFirefox } from "../../../helpers/userAgent";
 
 let setText = (text: string, row: Row) => {
   //fastRaf(() => {
@@ -52,6 +53,8 @@ let setText = (text: string, row: Row) => {
   //});
 };
 
+const PARALLAX_SUPPORTED = !isFirefox;
+
 type ListLoaderResult<T> = {count: number, items: any[]};
 class ListLoader<T> {
   public current: T;
@@ -164,14 +167,16 @@ class ListLoader<T> {
 }
 
 class PeerProfileAvatars {
-  public static BASE_CLASS = 'profile-avatars';
+  private static BASE_CLASS = 'profile-avatars';
+  private static SCALE = PARALLAX_SUPPORTED ? 2 : 1;
+  private static TRANSLATE_TEMPLATE = PARALLAX_SUPPORTED ? `translate3d({x}, 0, -1px) scale(${PeerProfileAvatars.SCALE})` : 'translate({x}, 0)';
   public container: HTMLElement;
   public avatars: HTMLElement;
   public gradient: HTMLElement;
   public info: HTMLElement;
-  public tabs: HTMLDivElement;
-  public listLoader: ListLoader<string | Message.messageService>;
-  public peerId: number;
+  private tabs: HTMLDivElement;
+  private listLoader: ListLoader<string | Message.messageService>;
+  private peerId: number;
 
   constructor(public scrollable: Scrollable) {
     this.container = document.createElement('div');
@@ -266,11 +271,11 @@ class PeerProfileAvatars {
       element: this.avatars, 
       onSwipe: (xDiff, yDiff) => {
         lastDiffX = xDiff;
-        let lastX = x + xDiff * -2;
+        let lastX = x + xDiff * -PeerProfileAvatars.SCALE;
         if(lastX > 0) lastX = 0;
         else if(lastX < minX) lastX = minX;
 
-        this.avatars.style.transform = `translate3d(${lastX}px, 0, -1px) scale(2)`;
+        this.avatars.style.transform = PeerProfileAvatars.TRANSLATE_TEMPLATE.replace('{x}', lastX + 'px');
         //console.log(xDiff, yDiff);
         return false;
       }, 
@@ -294,13 +299,13 @@ class PeerProfileAvatars {
         x = -width * lastIndex; */
         x = rect.left - this.container.getBoundingClientRect().left;
         
-        this.avatars.style.transform = `translate3d(${x}px, 0, -1px) scale(2)`;
+        this.avatars.style.transform = PeerProfileAvatars.TRANSLATE_TEMPLATE.replace('{x}', x + 'px');
 
         this.avatars.classList.add('no-transition');
         void this.avatars.offsetLeft; // reflow
       },
       onReset: () => {
-        const addIndex = Math.ceil(Math.abs(lastDiffX) / (width / 2)) * (lastDiffX >= 0 ? 1 : -1);
+        const addIndex = Math.ceil(Math.abs(lastDiffX) / (width / PeerProfileAvatars.SCALE)) * (lastDiffX >= 0 ? 1 : -1);
         cancelNextClick();
         
         //console.log(addIndex);
@@ -372,7 +377,8 @@ class PeerProfileAvatars {
       onJump: (item, older) => {
         const id = this.listLoader.index;
         //const nextId = Math.max(0, id);
-        this.avatars.style.transform = `translate3d(-${200 * id}%, 0, -1px) scale(2)`;
+        const x = 100 * PeerProfileAvatars.SCALE * id;
+        this.avatars.style.transform = PeerProfileAvatars.TRANSLATE_TEMPLATE.replace('{x}', `-${x}%`);
 
         const activeTab = this.tabs.querySelector('.active');
         if(activeTab) activeTab.classList.remove('active');
@@ -457,7 +463,9 @@ class PeerProfile {
   private threadId: number;
 
   constructor(public scrollable: Scrollable) {
-
+    if(!PARALLAX_SUPPORTED) {
+      this.scrollable.container.classList.add('no-parallax');
+    }
   }
 
   public init() {
@@ -609,13 +617,17 @@ class PeerProfile {
         if(oldAvatars) oldAvatars.container.replaceWith(this.avatars.container);
         else this.element.prepend(this.avatars.container);
 
-        this.scrollable.container.classList.add('parallax');
+        if(PARALLAX_SUPPORTED) {
+          this.scrollable.container.classList.add('parallax');
+        }
 
         return;
       }
     }
 
-    this.scrollable.container.classList.remove('parallax');
+    if(PARALLAX_SUPPORTED) {
+      this.scrollable.container.classList.remove('parallax');
+    }
 
     if(this.avatars) {
       this.avatars.container.remove();
diff --git a/src/helpers/userAgent.ts b/src/helpers/userAgent.ts
index 1335c8ad..d32848f1 100644
--- a/src/helpers/userAgent.ts
+++ b/src/helpers/userAgent.ts
@@ -25,6 +25,7 @@ export const isAppleMobile = (/iPad|iPhone|iPod/.test(navigator.platform) ||
   !ctx.MSStream;
 
 export const isSafari = !!('safari' in ctx) || !!(userAgent && (/\b(iPad|iPhone|iPod)\b/.test(userAgent) || (!!userAgent.match('Safari') && !userAgent.match('Chrome'))))/*  || true */;
+export const isFirefox = navigator.userAgent.toLowerCase().indexOf('firefox') > -1;
 
 export const isMobileSafari = isSafari && isAppleMobile;
 
diff --git a/src/pages/pageSignQR.ts b/src/pages/pageSignQR.ts
index 5b8d040f..9c19bc3b 100644
--- a/src/pages/pageSignQR.ts
+++ b/src/pages/pageSignQR.ts
@@ -161,9 +161,14 @@ let onFirstMount = async() => {
           break;
         default:
           console.error('pageSignQR: default error:', err);
+          stop = true;
           break;
       }
+
+      return true;
     }
+
+    return false;
   };
 
   await iterate(false);
diff --git a/src/scss/partials/_button.scss b/src/scss/partials/_button.scss
index 6db9466a..eeac8582 100644
--- a/src/scss/partials/_button.scss
+++ b/src/scss/partials/_button.scss
@@ -366,14 +366,14 @@
 }
 
 .btn-circle {
+  --size: 54px;
   border-radius: 50%;
-  height: 54px;
-  width: 54px;
-  line-height: 54px;
+  height: var(--size);
+  width: var(--size) !important;
+  line-height: var(--size);
   
   @include respond-to(handhelds) {
-    height: 46px;
-    width: 46px;
+    --size: 46px;
   }
   
   path {
diff --git a/src/scss/partials/_leftSidebar.scss b/src/scss/partials/_leftSidebar.scss
index 5361cf78..b810bcd2 100644
--- a/src/scss/partials/_leftSidebar.scss
+++ b/src/scss/partials/_leftSidebar.scss
@@ -357,8 +357,7 @@
       }
 
       @include respond-to(handhelds) {
-        width: 54px;
-        height: 54px;
+        --size: 54px;
         bottom: 14px;
         right: 14px;
 
diff --git a/src/scss/partials/_profile.scss b/src/scss/partials/_profile.scss
index efd73732..b7777a24 100644
--- a/src/scss/partials/_profile.scss
+++ b/src/scss/partials/_profile.scss
@@ -33,6 +33,10 @@
       transition: transform .2s ease-in-out;
       position: absolute;
 
+      .scrollable.no-parallax & {
+        transform: translate(0, 0);
+      }
+
       &:before {
         content: " ";
         top: 0;
diff --git a/src/scss/partials/_rightSidebar.scss b/src/scss/partials/_rightSidebar.scss
index 4de4b100..359090d5 100644
--- a/src/scss/partials/_rightSidebar.scss
+++ b/src/scss/partials/_rightSidebar.scss
@@ -110,7 +110,7 @@
       max-height: calc((var(--vh, 1vh) * 100) - 100% - 56px);
     }
   } */
-  .scrollable {
+  .scrollable:not(.no-parallax) {
     perspective: 0px;
     perspective-origin: left top;
 
diff --git a/src/scss/partials/_ripple.scss b/src/scss/partials/_ripple.scss
index 6ec422fe..8b6d62c8 100644
--- a/src/scss/partials/_ripple.scss
+++ b/src/scss/partials/_ripple.scss
@@ -57,6 +57,7 @@
     //animation-timing-function: ease-out;
     transition: .35s opacity, .35s background-color;
     //overflow: hidden;
+    pointer-events: none;
 
     .btn-menu &, .c-ripple.is-square & {
       animation-name: ripple-effect-handhelds;
diff --git a/src/scss/partials/_slider.scss b/src/scss/partials/_slider.scss
index bfb1d4b1..6b50d923 100644
--- a/src/scss/partials/_slider.scss
+++ b/src/scss/partials/_slider.scss
@@ -118,10 +118,12 @@
   // }
   
   > div {
-    height: 100%;
-    max-height: 100%;
-    width: 100%;
-    max-width: 100%;
+    // * can't define these rules because of old firefox, though they don't work
+    //height: 100%;
+    //max-height: 100%;
+    //width: 100%;
+    //max-width: 100%;
+    
     display: none;
     flex-direction: column;
     position: relative;