diff --git a/base.html b/base.html
index 5f48de97a459..f5d75e2eb99e 100644
--- a/base.html
+++ b/base.html
@@ -1 +1 @@
-<base href="/">
\ No newline at end of file
+<base href="/" />
diff --git a/css/_base.scss b/css/_base.scss
index 3e7e75f93fd9..64bd8125a02a 100644
--- a/css/_base.scss
+++ b/css/_base.scss
@@ -44,7 +44,6 @@ body {
 }
 
 .jitsi-icon {
-    line-height: 0;
     &-default svg {
         fill: white;
     }
diff --git a/css/_videolayout_default.scss b/css/_videolayout_default.scss
index 738ba0d208a1..0b339a53bac5 100644
--- a/css/_videolayout_default.scss
+++ b/css/_videolayout_default.scss
@@ -23,10 +23,6 @@
     overflow: hidden;
 }
 
-.jBzxHz, #react {
-    height: 100%;
-}
-
 #largeVideoBackgroundContainer,
 .large-video-background {
     height: 100%;
diff --git a/doc/examples/api.html b/doc/examples/api.html
index 3099c29a95ef..8871d3ff01bc 100644
--- a/doc/examples/api.html
+++ b/doc/examples/api.html
@@ -1,8 +1,7 @@
-<!doctype html>
-<html itemscope itemtype="http://schema.org/Product" prefix="og: http://ogp.me/ns#">
+<html itemscope itemtype="http://schema.org/Product" prefix="og: http://ogp.me/ns#" xmlns="http://www.w3.org/1999/html">
     <head>
         <meta charset="utf-8">
-        <title>Jitsi API</title>
+        <meta http-equiv="content-type" content="text/html;charset=utf-8">
     </head>
     <body>
         <script src="https://meet.jit.si/external_api.js"></script>
diff --git a/index.html b/index.html
index b91a04d46abf..3585a7706733 100644
--- a/index.html
+++ b/index.html
@@ -1,8 +1,8 @@
-<!doctype html>
-<html itemscope itemtype="http://schema.org/Product" prefix="og: http://ogp.me/ns#">
+<html itemscope itemtype="http://schema.org/Product" prefix="og: http://ogp.me/ns#" xmlns="http://www.w3.org/1999/html">
   <head>
     <!--#include virtual="head.html" -->
     <meta charset="utf-8">
+    <meta http-equiv="content-type" content="text/html;charset=utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0">
     <meta name="theme-color" content="#2A3A4B">
     <!--#include virtual="base.html" -->
@@ -125,12 +125,12 @@
                         + "font-weight: 400;"
                         + "transform: translate(-50%, -50%)'>"
                         + "Uh oh! We couldn't fully download everything we needed :("
-                        + "<br> "
+                        + "<br/> "
                         + "We will try again shortly. In the mean time, check for problems with your Internet connection!"
-                        + "<br><br> "
+                        + "<br/><br/> "
                         + "<div id='moreInfo' style='"
                         + "display: none;'>" + "Missing " + fileRef
-                        + "<br><br></div>"
+                        + "<br/><br/></div>"
                         + "<a id='showMore' style='"
                         + "text-decoration: underline;"
                         + "font-size:small;"
@@ -195,8 +195,8 @@
     <!--#include virtual="static/settingsToolbarAdditionalContent.html" -->
   </head>
   <body>
-    <noscript>
-        <div>JavaScript is disabled.<br>For this site to work you have to enable JavaScript.</div>
+    <noscript aria-hidden="true">
+        <div>JavaScript is disabled. </br>For this site to work you have to enable JavaScript.</div>
     </noscript>
     <!--#include virtual="body.html" -->
     <div id="react" role="main"></div>
diff --git a/react/features/speaker-stats/components/web/SpeakerStatsSearch.js b/react/features/speaker-stats/components/web/SpeakerStatsSearch.js
index 80c018ce8216..2b11631b4f69 100644
--- a/react/features/speaker-stats/components/web/SpeakerStatsSearch.js
+++ b/react/features/speaker-stats/components/web/SpeakerStatsSearch.js
@@ -37,7 +37,6 @@ const useStyles = makeStyles(theme => {
             padding: '10px 16px',
             width: '100%',
             height: 40,
-            boxSizing: 'border-box',
             '&::placeholder': {
                 color: theme.palette.text03,
                 ...theme.typography.bodyShortRegular,
diff --git a/resources/nwjs-integration/index.html b/resources/nwjs-integration/index.html
index b38137a1a86d..fce912d88144 100644
--- a/resources/nwjs-integration/index.html
+++ b/resources/nwjs-integration/index.html
@@ -1,7 +1,6 @@
-<!doctype html>
 <html>
     <head>
-        <title>Jitsi NW GUI</title>
+
         <style>
             body {
                 margin: 0;
diff --git a/static/404.html b/static/404.html
index 4457a5fed6bd..2c80b2a52027 100644
--- a/static/404.html
+++ b/static/404.html
@@ -1,8 +1,7 @@
-<!doctype html>
 <html>
 <head>
     <!--#include virtual="/base.html" -->
-    <link rel="stylesheet" href="css/all.css">
+    <link rel="stylesheet" href="css/all.css"/>
     <!--#include virtual="/title.html" -->
 </head>
 <body>
diff --git a/static/authError.html b/static/authError.html
index d7e2b6d665f5..e12558ac9f95 100644
--- a/static/authError.html
+++ b/static/authError.html
@@ -1,8 +1,7 @@
-<!doctype html>
 <html>
 <head>
     <!--#include virtual="/base.html" -->
-    <link rel="stylesheet" href="css/all.css">
+    <link rel="stylesheet" href="css/all.css"/>
     <!--#include virtual="/title.html" -->
 </head>
 <body>
diff --git a/static/close.html b/static/close.html
index b0ee21aeea6d..a22341d24aa5 100644
--- a/static/close.html
+++ b/static/close.html
@@ -1,8 +1,7 @@
-<!doctype html>
 <html>
 <head>
     <!--#include virtual="/base.html" -->
-    <link rel="stylesheet" href="css/all.css">
+    <link rel="stylesheet" href="css/all.css"/>
     <!--#include virtual="/title.html" -->
     <script><!--#include virtual="/interface_config.js" --></script>
     <script src="static/close.js"></script>
diff --git a/static/close2.html b/static/close2.html
index c938ccc1125f..39047247e8ed 100644
--- a/static/close2.html
+++ b/static/close2.html
@@ -1,8 +1,7 @@
-<!doctype html>
 <html>
 <head>
     <!--#include virtual="/base.html" -->
-    <link rel="stylesheet" href="css/all.css">
+    <link rel="stylesheet" href="css/all.css"/>
     <!--#include virtual="/title.html" -->
     <script><!--#include virtual="/interface_config.js" --></script>
     <script src="static/close.js"></script>
diff --git a/static/dialInInfo.html b/static/dialInInfo.html
index 31fce0b30126..4fa19553b5c4 100644
--- a/static/dialInInfo.html
+++ b/static/dialInInfo.html
@@ -1,4 +1,3 @@
-<!doctype html>
 <html>
   <head>
     <meta charset="utf-8">
diff --git a/static/msredirect.html b/static/msredirect.html
index 9d878e55a59a..70947774cd74 100644
--- a/static/msredirect.html
+++ b/static/msredirect.html
@@ -1,4 +1,4 @@
-<!doctype html>
+<!DOCTYPE html>
 <html>
 <body>
 <script>
diff --git a/static/oauth.html b/static/oauth.html
index 9dc580c27557..7f02b24c332a 100644
--- a/static/oauth.html
+++ b/static/oauth.html
@@ -1,8 +1,7 @@
-<!doctype html>
-<html itemscope itemtype="http://schema.org/Product" prefix="og: http://ogp.me/ns#">
+<html itemscope itemtype="http://schema.org/Product" prefix="og: http://ogp.me/ns#" xmlns="http://www.w3.org/1999/html">
 <head>
     <meta charset="utf-8">
-    <title>Jitsi login</title>
+    <meta http-equiv="content-type" content="text/html;charset=utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <!--#include virtual="/base.html" -->
     <!--#include virtual="/title.html" -->
diff --git a/static/offline.html b/static/offline.html
index 879db03be316..16e3d688bfb2 100644
--- a/static/offline.html
+++ b/static/offline.html
@@ -1,10 +1,10 @@
-<!doctype html>
 <html>
 
 <head>
   <head>
     <!--#include virtual="/head.html" -->
     <meta charset="utf-8">
+    <meta http-equiv="content-type" content="text/html;charset=utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <!--#include virtual="/base.html" -->
 
diff --git a/static/prejoin.html b/static/prejoin.html
index 88b10f701630..e0156b2beeaf 100644
--- a/static/prejoin.html
+++ b/static/prejoin.html
@@ -1,7 +1,7 @@
-<!doctype html>
-<html>
+<html xmlns="http://www.w3.org/1999/html">
   <head>
     <meta charset="utf-8">
+    <meta http-equiv="content-type" content="text/html;charset=utf-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <!--#include virtual="/base.html" -->
     <link rel="stylesheet" href="css/all.css">
diff --git a/static/recommendedBrowsers.html b/static/recommendedBrowsers.html
index d316ff02b81f..1249bade74a8 100644
--- a/static/recommendedBrowsers.html
+++ b/static/recommendedBrowsers.html
@@ -1,8 +1,7 @@
-<!doctype html>
 <html>
 <head>
     <!--#include virtual="/base.html" -->
-    <link rel="stylesheet" href="css/all.css">
+    <link rel="stylesheet" href="css/all.css"/>
     <!--#include virtual="/title.html" -->
 </head>
 <body>
@@ -13,11 +12,11 @@ <h2 class = 'unsupported-desktop-browser__title'>
         <p class ='unsupported-desktop-browser__description'>
             We recommend to try with the latest version of&nbsp;
             <a
-                class='unsupported-desktop-browser__link'
-                href='https://www.google.com/chrome/' >Chrome</a>&nbsp;or&nbsp;
+                className = 'unsupported-desktop-browser__link'
+                href = 'https://www.google.com/chrome/' >Chrome</a>&nbsp;or&nbsp;
             <a
-                class='unsupported-desktop-browser__link'
-                href='https://www.chromium.org/'>Chromium</a>
+                class = 'unsupported-desktop-browser__link'
+                href = 'https://www.chromium.org/'>Chromium</a>
         </p>
     </div>
 </body>
diff --git a/static/settingsToolbarAdditionalContent.html b/static/settingsToolbarAdditionalContent.html
index 521320f21492..a63bae990cd4 100644
--- a/static/settingsToolbarAdditionalContent.html
+++ b/static/settingsToolbarAdditionalContent.html
@@ -1 +1 @@
-<template id="settings-toolbar-additional-content-template"></template>
\ No newline at end of file
+<template id="settings-toolbar-additional-content-template"></template>
diff --git a/static/welcomePageAdditionalCard.html b/static/welcomePageAdditionalCard.html
index 3f6169514e73..9c938da12d06 100644
--- a/static/welcomePageAdditionalCard.html
+++ b/static/welcomePageAdditionalCard.html
@@ -1 +1 @@
-<template id="welcome-page-additional-card-template"></template>
\ No newline at end of file
+<template id = "welcome-page-additional-card-template"></template>
diff --git a/static/welcomePageAdditionalContent.html b/static/welcomePageAdditionalContent.html
index bf5fda4b1a8a..a62e0787ac00 100644
--- a/static/welcomePageAdditionalContent.html
+++ b/static/welcomePageAdditionalContent.html
@@ -1 +1 @@
-<template id="welcome-page-additional-content-template"></template>
\ No newline at end of file
+<template id = "welcome-page-additional-content-template"></template>
diff --git a/title.html b/title.html
index 8976f5f21bc3..f5928cfa1790 100644
--- a/title.html
+++ b/title.html
@@ -1,9 +1,9 @@
 <title>Jitsi Meet</title>
-<meta property="og:title" content="Jitsi Meet">
-<meta property="og:image" content="images/jitsilogo.png?v=1">
-<meta property="og:description" content="Join a WebRTC video conference powered by the Jitsi Videobridge">
-<meta name="description" content="Join a WebRTC video conference powered by the Jitsi Videobridge">
-<meta itemprop="name" content="Jitsi Meet">
-<meta itemprop="description" content="Join a WebRTC video conference powered by the Jitsi Videobridge">
-<meta itemprop="image" content="images/jitsilogo.png?v=1">
-<link rel="icon" type="image/png" href="images/favicon.ico?v=1">
\ No newline at end of file
+<meta property="og:title" content="Jitsi Meet"/>
+<meta property="og:image" content="images/jitsilogo.png?v=1"/>
+<meta property="og:description" content="Join a WebRTC video conference powered by the Jitsi Videobridge"/>
+<meta description="Join a WebRTC video conference powered by the Jitsi Videobridge"/>
+<meta itemprop="name" content="Jitsi Meet"/>
+<meta itemprop="description" content="Join a WebRTC video conference powered by the Jitsi Videobridge"/>
+<meta itemprop="image" content="images/jitsilogo.png?v=1"/>
+<link rel="icon" type="image/png" href="images/favicon.ico?v=1"/>
