diff --git a/apps/common/embed/resources/less/common.less b/apps/common/embed/resources/less/common.less
index 1f0d4e378..9703638ad 100644
--- a/apps/common/embed/resources/less/common.less
+++ b/apps/common/embed/resources/less/common.less
@@ -239,7 +239,7 @@
     display: block;
     width: 100px;
     height: 20px;
-    background: data-uri('../../../../common/embed/resources/img/logo.svg') no-repeat;
+    background: url(../../../../common/embed/resources/img/logo.svg) no-repeat;
 }
 
 // Control buttons
diff --git a/apps/common/mobile/lib/view/About.jsx b/apps/common/mobile/lib/view/About.jsx
index 039533f22..3dd4cac9a 100644
--- a/apps/common/mobile/lib/view/About.jsx
+++ b/apps/common/mobile/lib/view/About.jsx
@@ -18,7 +18,8 @@ const PageAbout = props => {
     const logoCustomer = customer ? customer.logo : null;
 
     const publisherUrl = __PUBLISHER_URL__,
-        publisherPrintUrl = publisherUrl.replace(/https?:\/{2}|\/$/,"");
+        publisherPrintUrl = publisherUrl.replace(/https?:\/{2}|\/$/g,"");
+    const publisherName = __PUBLISHER_NAME__.replace(/\\"/g, '"');
     
     const editors = {
         de: 'DOCUMENT EDITOR',
@@ -79,7 +80,7 @@ const PageAbout = props => {
                         <p>
                             <label>{_t.textPoweredBy}</label>
                         </p>
-                        <h3 className="vendor">{__PUBLISHER_NAME__}</h3>
+                        <h3 className="vendor">{publisherName}</h3>
                         <p>
                             <Link className="external" target="_blank" href={publisherUrl}>{publisherPrintUrl}</Link>
                         </p>
@@ -95,7 +96,7 @@ const PageAbout = props => {
                         <h3>{_t.textVersion} {__PRODUCT_VERSION__}</h3>
                     </div>
                     <div className="content-block">
-                        <h3 id="settings-about-name" className="vendor">{__PUBLISHER_NAME__}</h3>
+                        <h3 id="settings-about-name" className="vendor">{publisherName}</h3>
                         <p>
                             <label>{_t.textAddress}:</label>
                             <a id="settings-about-address" className="external">{__PUBLISHER_ADDRESS__}</a>
diff --git a/apps/common/mobile/resources/less/about.less b/apps/common/mobile/resources/less/about.less
index 8a7559530..3072fb575 100644
--- a/apps/common/mobile/resources/less/about.less
+++ b/apps/common/mobile/resources/less/about.less
@@ -1,4 +1,5 @@
 @text-normal: #000;
+// @common-image-about-path - defined in webpack config
 
 .about {
     .page-content {
@@ -36,6 +37,6 @@
           display: inline-block;
           width: 100%;
           height: 55px;
-          background: url('../../../../common/main/resources/img/about/logo_s.svg') no-repeat center;
+          background: ~"url(@{common-image-about-path}/logo_s.svg) no-repeat center";
     }
 }
diff --git a/apps/common/mobile/resources/less/ios/icons.less b/apps/common/mobile/resources/less/ios/icons.less
index 4339dc06a..401956832 100644
--- a/apps/common/mobile/resources/less/ios/icons.less
+++ b/apps/common/mobile/resources/less/ios/icons.less
@@ -1,3 +1,5 @@
+// @common-image-header-path - defined in webpack config
+
 .device-ios {
     i.icon {
         &.icon_mask {
@@ -6,7 +8,7 @@
         &.icon-logo {
             width: 100px;
             height: 14px;
-            background: url('../../img/header/logo-ios.svg') no-repeat center;
+            background: ~"url(@{common-image-header-path}/logo-ios.svg)" no-repeat center;
         }
         &.icon-prev {
             width: 22px;
diff --git a/apps/common/mobile/resources/less/material/icons.less b/apps/common/mobile/resources/less/material/icons.less
index ffc52be05..53577e587 100644
--- a/apps/common/mobile/resources/less/material/icons.less
+++ b/apps/common/mobile/resources/less/material/icons.less
@@ -1,3 +1,5 @@
+// @common-image-header-path - defined in webpack config
+
 .device-android {
     i.icon {
         &.icon_mask {
@@ -6,7 +8,7 @@
         &.icon-logo {
             width: 100px;
             height: 14px;
-            background: url('../../img/header/logo-android.svg') no-repeat center;
+            background: ~"url(@{common-image-header-path}/logo-android.svg) no-repeat center";
         }
         &.icon-prev {
             width: 20px;
diff --git a/apps/documenteditor/main/index_loader.html.deploy b/apps/documenteditor/main/index_loader.html.deploy
index 3f60b2346..2ed070fc8 100644
--- a/apps/documenteditor/main/index_loader.html.deploy
+++ b/apps/documenteditor/main/index_loader.html.deploy
@@ -287,7 +287,7 @@
     <link rel="stylesheet" type="text/css" href="../../../apps/documenteditor/main/resources/css/app.css">
 </head>
 <body>
-    <script src="../../common/main/lib/util/htmlutils.js"></script>
+    <script src="../../../../../apps/common/main/lib/util/htmlutils.js?__inline=true"></script>
 
     <script>
         window.requireTimeourError = function(){
diff --git a/apps/documenteditor/mobile/src/index_dev.html b/apps/documenteditor/mobile/src/index_dev.html
index b04484be7..da5516e89 100644
--- a/apps/documenteditor/mobile/src/index_dev.html
+++ b/apps/documenteditor/mobile/src/index_dev.html
@@ -83,12 +83,13 @@
             return urlParams;
         };
 
+        window.Common = {Locale: {defaultLang: <%= htmlWebpackPlugin.options.system.env.defaultLang %>}};
         let params = getUrlParams(),
-            lang = (params["lang"] || 'en').split(/[\-\_]/)[0];
+            lang = (params["lang"] || window.Common.Locale.defaultLang).split(/[\-\_]/)[0];
 
+        window.Common.Locale.currentLang = lang;
         window.frameEditorId = params["frameEditorId"];
         window.parentOrigin = params["parentOrigin"];
-        window.Common = {Locale: {currentLang: lang}};
     </script>
 
     <script type="text/javascript" src="../../../vendor/jquery/jquery.min.js"></script>
diff --git a/apps/documenteditor/mobile/src/lib/i18n.js b/apps/documenteditor/mobile/src/lib/i18n.js
index fea50f663..d77f77191 100644
--- a/apps/documenteditor/mobile/src/lib/i18n.js
+++ b/apps/documenteditor/mobile/src/lib/i18n.js
@@ -6,7 +6,7 @@ i18n.use(initReactI18next)
     .use(Fetch)
     .init({
         lng: Common.Locale.currentLang,
-        fallbackLng: "en",
+        fallbackLng: Common.Locale.defaultLang,
         escapeValue: false,
         backend: {
             loadPath: './locale/{{lng}}.json'
diff --git a/apps/documenteditor/mobile/src/page/main.jsx b/apps/documenteditor/mobile/src/page/main.jsx
index 25d2abca5..871e7cc75 100644
--- a/apps/documenteditor/mobile/src/page/main.jsx
+++ b/apps/documenteditor/mobile/src/page/main.jsx
@@ -86,7 +86,12 @@ class MainPage extends Component {
   render() {
       const appOptions = this.props.storeAppOptions;
       const config = appOptions.config;
-      const showLogo = !(appOptions.canBrandingExt && (config.customization && (config.customization.loaderName || config.customization.loaderLogo)));
+
+      let showLogo = !(appOptions.canBrandingExt && (config.customization && (config.customization.loaderName || config.customization.loaderLogo)));
+      if ( !Object.keys(config).length ) {
+          showLogo = !/&(?:logo)=/.test(window.location.search);
+      }
+
       const showPlaceholder = !appOptions.isDocReady && (!config.customization || !(config.customization.loaderName || config.customization.loaderLogo));
       if ( $$('.skl-container').length ) {
           $$('.skl-container').remove();
diff --git a/apps/presentationeditor/main/index_loader.html.deploy b/apps/presentationeditor/main/index_loader.html.deploy
index 89730f698..d109aa1ad 100644
--- a/apps/presentationeditor/main/index_loader.html.deploy
+++ b/apps/presentationeditor/main/index_loader.html.deploy
@@ -287,7 +287,7 @@
     <link rel="stylesheet" type="text/css" href="../../../apps/presentationeditor/main/resources/css/app.css">
 </head>
 <body>
-    <script src="../../common/main/lib/util/htmlutils.js"></script>
+    <script src="../../../../../apps/common/main/lib/util/htmlutils.js?__inline=true"></script>
 
     <script>
         window.requireTimeourError = function(){
diff --git a/apps/presentationeditor/mobile/src/index_dev.html b/apps/presentationeditor/mobile/src/index_dev.html
index b2ba2fe15..56c8e5234 100644
--- a/apps/presentationeditor/mobile/src/index_dev.html
+++ b/apps/presentationeditor/mobile/src/index_dev.html
@@ -78,8 +78,9 @@
             return urlParams;
         }
 
+        window.Common = {Locale: {defaultLang: <%= htmlWebpackPlugin.options.system.env.defaultLang %>}};
         let params = getUrlParams(),
-            lang = (params["lang"] || 'en').split(/[\-\_]/)[0];
+            lang = (params["lang"] || window.Common.Locale.defaultLang).split(/[\-\_]/)[0];
 
         window.frameEditorId = params["frameEditorId"];
         window.parentOrigin = params["parentOrigin"];
diff --git a/apps/presentationeditor/mobile/src/less/icons-material.less b/apps/presentationeditor/mobile/src/less/icons-material.less
index ecd71da8f..90ffdba25 100644
--- a/apps/presentationeditor/mobile/src/less/icons-material.less
+++ b/apps/presentationeditor/mobile/src/less/icons-material.less
@@ -489,7 +489,7 @@
       &.icon-logo {
         width: 100px;
         height: 14px;
-        background: url('../../../../common/mobile/resources/img/header/logo-android.svg') no-repeat center;
+        //background: url('../../../../common/mobile/resources/img/header/logo-android.svg') no-repeat center;
       }
 
       &.icon-undo {
diff --git a/apps/presentationeditor/mobile/src/lib/i18n.js b/apps/presentationeditor/mobile/src/lib/i18n.js
index fea50f663..d77f77191 100644
--- a/apps/presentationeditor/mobile/src/lib/i18n.js
+++ b/apps/presentationeditor/mobile/src/lib/i18n.js
@@ -6,7 +6,7 @@ i18n.use(initReactI18next)
     .use(Fetch)
     .init({
         lng: Common.Locale.currentLang,
-        fallbackLng: "en",
+        fallbackLng: Common.Locale.defaultLang,
         escapeValue: false,
         backend: {
             loadPath: './locale/{{lng}}.json'
diff --git a/apps/presentationeditor/mobile/src/page/main.jsx b/apps/presentationeditor/mobile/src/page/main.jsx
index 03e0740b6..8b07c3513 100644
--- a/apps/presentationeditor/mobile/src/page/main.jsx
+++ b/apps/presentationeditor/mobile/src/page/main.jsx
@@ -97,7 +97,12 @@ class MainPage extends Component {
     render() {
         const appOptions = this.props.storeAppOptions;
         const config = appOptions.config;
-        const showLogo = !(appOptions.canBrandingExt && (config.customization && (config.customization.loaderName || config.customization.loaderLogo)));
+
+        let showLogo = !(appOptions.canBrandingExt && (config.customization && (config.customization.loaderName || config.customization.loaderLogo)));
+        if ( !Object.keys(config).length ) {
+            showLogo = !/&(?:logo)=/.test(window.location.search);
+        }
+
         const showPlaceholder = !appOptions.isDocReady && (!config.customization || !(config.customization.loaderName || config.customization.loaderLogo));
         return (
             <Fragment>
diff --git a/apps/spreadsheeteditor/main/index_loader.html.deploy b/apps/spreadsheeteditor/main/index_loader.html.deploy
index 767a90f05..a221fcab1 100644
--- a/apps/spreadsheeteditor/main/index_loader.html.deploy
+++ b/apps/spreadsheeteditor/main/index_loader.html.deploy
@@ -287,7 +287,7 @@
     <link rel="stylesheet" type="text/css" href="../../../apps/spreadsheeteditor/main/resources/css/app.css">
 </head>
 <body>
-    <script src="../../common/main/lib/util/htmlutils.js"></script>
+    <script src="../../../../../apps/common/main/lib/util/htmlutils.js?__inline=true"></script>
     <script>
         window.requireTimeourError = function(){
             var reqerr;
diff --git a/apps/spreadsheeteditor/mobile/src/index_dev.html b/apps/spreadsheeteditor/mobile/src/index_dev.html
index 6ba4fe789..bde42801c 100644
--- a/apps/spreadsheeteditor/mobile/src/index_dev.html
+++ b/apps/spreadsheeteditor/mobile/src/index_dev.html
@@ -78,8 +78,9 @@
             return urlParams;
         }
 
+        window.Common = {Locale: {defaultLang: <%= htmlWebpackPlugin.options.system.env.defaultLang %>}};
         let params = getUrlParams(),
-            lang = (params["lang"] || 'en').split(/[\-\_]/)[0];
+            lang = (params["lang"] || window.Common.Locale.defaultLang).split(/[\-\_]/)[0];
 
         window.frameEditorId = params["frameEditorId"];
         window.parentOrigin = params["parentOrigin"];
diff --git a/apps/spreadsheeteditor/mobile/src/less/icons-material.less b/apps/spreadsheeteditor/mobile/src/less/icons-material.less
index 928c5806f..082c7f232 100644
--- a/apps/spreadsheeteditor/mobile/src/less/icons-material.less
+++ b/apps/spreadsheeteditor/mobile/src/less/icons-material.less
@@ -414,7 +414,7 @@
             &.icon-logo {
                 width: 100px;
                 height: 14px;
-                background: url('../../../../common/mobile/resources/img/header/logo-android.svg') no-repeat center;
+                //background: url('../../../../common/mobile/resources/img/header/logo-android.svg') no-repeat center;
             }
             &.icon-undo {
                 width: 22px;
diff --git a/apps/spreadsheeteditor/mobile/src/lib/i18n.js b/apps/spreadsheeteditor/mobile/src/lib/i18n.js
index fea50f663..d77f77191 100644
--- a/apps/spreadsheeteditor/mobile/src/lib/i18n.js
+++ b/apps/spreadsheeteditor/mobile/src/lib/i18n.js
@@ -6,7 +6,7 @@ i18n.use(initReactI18next)
     .use(Fetch)
     .init({
         lng: Common.Locale.currentLang,
-        fallbackLng: "en",
+        fallbackLng: Common.Locale.defaultLang,
         escapeValue: false,
         backend: {
             loadPath: './locale/{{lng}}.json'
diff --git a/apps/spreadsheeteditor/mobile/src/page/main.jsx b/apps/spreadsheeteditor/mobile/src/page/main.jsx
index ad588fc10..01819c476 100644
--- a/apps/spreadsheeteditor/mobile/src/page/main.jsx
+++ b/apps/spreadsheeteditor/mobile/src/page/main.jsx
@@ -92,7 +92,12 @@ class MainPage extends Component {
       const wsProps = storeWorksheets.wsProps;
       const wsLock = storeWorksheets.wsLock;
       const config = appOptions.config;
-      const showLogo = !(appOptions.canBrandingExt && (config.customization && (config.customization.loaderName || config.customization.loaderLogo)));
+
+      let showLogo = !(appOptions.canBrandingExt && (config.customization && (config.customization.loaderName || config.customization.loaderLogo)));
+      if ( !Object.keys(config).length ) {
+          showLogo = !/&(?:logo)=/.test(window.location.search);
+      }
+
       const showPlaceholder = !appOptions.isDocReady && (!config.customization || !(config.customization.loaderName || config.customization.loaderLogo));
       if ( $$('.skl-container').length ) {
           $$('.skl-container').remove();
diff --git a/build/Gruntfile.js b/build/Gruntfile.js
index 2deb12dea..3df6b23d0 100644
--- a/build/Gruntfile.js
+++ b/build/Gruntfile.js
@@ -284,6 +284,7 @@ module.exports = function(grunt) {
     doRegisterTask('es6-promise');
     doRegisterTask('jszip');
     doRegisterTask('jsziputils');
+    doRegisterTask('common-embed');
     doRegisterTask('requirejs', function(defaultConfig, packageFile) {
         return {
             uglify: {
@@ -655,6 +656,7 @@ module.exports = function(grunt) {
     grunt.registerTask('deploy-jsziputils',             ['jsziputils-init', 'clean', 'copy']);
     grunt.registerTask('deploy-requirejs',              ['requirejs-init', 'clean', 'uglify']);
     grunt.registerTask('deploy-es6-promise',            ['es6-promise-init', 'clean', 'copy']);
+    grunt.registerTask('deploy-common-embed',           ['common-embed-init', 'clean', 'copy']);
 
     grunt.registerTask('deploy-app-main',               ['prebuild-icons-sprite', 'main-app-init', 'clean:prebuild', 'imagemin', 'less',
                                                             'requirejs', 'concat', 'copy', 'svgmin', 'inline', 'json-minify',
diff --git a/build/common.json b/build/common.json
index 0e3b6a3f2..3e7f7220d 100644
--- a/build/common.json
+++ b/build/common.json
@@ -267,6 +267,17 @@
             "dest": "../deploy/web-apps/vendor/requirejs/require.js"
         }
     },
+    "common-embed": {
+        "clean": [
+            "../deploy/web-apps/apps/common/embed"
+        ],
+        "copy": {
+            "app-logo": {
+                "dest": "../deploy/web-apps/apps/common/embed/resources/img/logo.svg",
+                "src": "../apps/common/embed/resources/img/logo.svg"
+            }
+        }
+    },
     "tasks": {
         "deploy": [
             "increment-build",
@@ -284,7 +295,8 @@
             "deploy-fetch",
             "deploy-jszip",
             "deploy-jsziputils",
-            "deploy-es6-promise"
+            "deploy-es6-promise",
+            "deploy-common-embed"
         ]
     }
 }
\ No newline at end of file
diff --git a/build/documenteditor.json b/build/documenteditor.json
index 2253ff379..581ba44c9 100644
--- a/build/documenteditor.json
+++ b/build/documenteditor.json
@@ -293,6 +293,12 @@
                     "cwd": "../apps/common/mobile/resources/img/",
                     "src": "**",
                     "dest": "../deploy/web-apps/apps/documenteditor/mobile/resources/img/"
+                },
+                {
+                    "expand": true,
+                    "cwd": "../apps/common/main/resources/img/about",
+                    "src": "**",
+                    "dest": "../deploy/web-apps/apps/documenteditor/mobile/resources/img/about"
                 }
             ],
             "assets": [
diff --git a/build/presentationeditor.json b/build/presentationeditor.json
index 9e5961a4a..4d2ebeee0 100644
--- a/build/presentationeditor.json
+++ b/build/presentationeditor.json
@@ -309,6 +309,12 @@
                     "cwd": "../apps/common/mobile/resources/img/",
                     "src": "**",
                     "dest": "../deploy/web-apps/apps/presentationeditor/mobile/resources/img/"
+                },
+                {
+                    "expand": true,
+                    "cwd": "../apps/common/main/resources/img/about",
+                    "src": "**",
+                    "dest": "../deploy/web-apps/apps/presentationeditor/mobile/resources/img/about"
                 }
             ]
         }
diff --git a/build/spreadsheeteditor.json b/build/spreadsheeteditor.json
index 784cea7d4..c0b8bddb8 100644
--- a/build/spreadsheeteditor.json
+++ b/build/spreadsheeteditor.json
@@ -319,7 +319,13 @@
             "images-common": [
                 {
                     "expand": true,
-                    "cwd": "../apps/common/mobile/resources/img/about",
+                    "cwd": "../apps/common/mobile/resources/img/",
+                    "src": "**",
+                    "dest": "../deploy/web-apps/apps/spreadsheeteditor/mobile/resources/img/"
+                },
+                {
+                    "expand": true,
+                    "cwd": "../apps/common/main/resources/img/about",
                     "src": "**",
                     "dest": "../deploy/web-apps/apps/spreadsheeteditor/mobile/resources/img/about"
                 }
@@ -369,7 +375,7 @@
             "index-page": {
                 "../deploy/web-apps/apps/spreadsheeteditor/embed/index.html": "../apps/spreadsheeteditor/embed/index.html.deploy",
                 "../deploy/web-apps/apps/spreadsheeteditor/embed/index_loader.html": "../apps/spreadsheeteditor/embed/index_loader.html.deploy"
-           },
+            },
             "images-app": [
                 {
                     "expand": true,
diff --git a/vendor/framework7-react/build/webpack.config.js b/vendor/framework7-react/build/webpack.config.js
index 447c2d9ef..45bc1e01d 100644
--- a/vendor/framework7-react/build/webpack.config.js
+++ b/vendor/framework7-react/build/webpack.config.js
@@ -51,7 +51,7 @@ module.exports = {
       jquery: 'jQuery'
   },
 
-  devtool: env === 'production' ? /*false*/'source-map' : 'source-map', // TODO: turn off debugger source map before release
+  devtool: env === 'production' ? false/*'source-map'*/ : 'source-map', // TODO: turn off debugger source map before release
   optimization: {
     minimizer: [new TerserPlugin({
     })],
@@ -117,7 +117,7 @@ module.exports = {
               publicPath: '../'
             }
           }),
-            'css-loader',
+            'css-loader?url=false',
             {
                 loader: 'postcss-loader',
                 options: {
@@ -130,7 +130,11 @@ module.exports = {
               loader: "less-loader",
               options: {
                 lessOptions: {
-                  javascriptEnabled: true
+                  javascriptEnabled: true,
+                  globalVars: {
+                      "common-image-header-path": env === 'production' ? `../../../${editor}/mobile/resources/img/header` : '../../common/mobile/resources/img/header',
+                      "common-image-about-path": env === 'production' ? `../../../${editor}/mobile/resources/img/about` : '../../common/main/resources/img/about',
+                  }
                 }
               }
             },
@@ -162,14 +166,14 @@ module.exports = {
       'process.env.NODE_ENV': JSON.stringify(env),
       'process.env.TARGET': JSON.stringify(target),
       __PRODUCT_VERSION__: JSON.stringify(process.env.PRODUCT_VERSION ? process.env.PRODUCT_VERSION : '6.2.0d'),
-      __PUBLISHER_ADDRESS__: JSON.stringify('20A-12 Ernesta Birznieka-Upisha street, Riga, Latvia, EU, LV-1050'),
-      __SUPPORT_EMAIL__: JSON.stringify('support@onlyoffice.com'),
-      __PUBLISHER_PHONE__: JSON.stringify('+371 633-99867'),
-      __PUBLISHER_URL__: JSON.stringify('https://www.onlyoffice.com'),
-      __PUBLISHER_NAME__: JSON.stringify('Ascensio System SIA'),
+      __PUBLISHER_ADDRESS__: JSON.stringify(process.env.PUBLISHER_ADDRESS || '20A-12 Ernesta Birznieka-Upisha street, Riga, Latvia, EU, LV-1050'),
+      __SUPPORT_EMAIL__: JSON.stringify(process.env.SUPPORT_EMAIL || 'support@onlyoffice.com'),
+      __PUBLISHER_PHONE__: JSON.stringify(process.env.PUBLISHER_PHONE || '+371 633-99867'),
+      __PUBLISHER_URL__: JSON.stringify(process.env.PUBLISHER_URL || 'https://www.onlyoffice.com'),
+      __PUBLISHER_NAME__: JSON.stringify(process.env.PUBLISHER_NAME || 'Ascensio System SIA'),
       __APP_TITLE_TEXT__: JSON.stringify(process.env.APP_TITLE_TEXT ? process.env.APP_TITLE_TEXT : 'ONLYOFFICE'),
       __COMPANY_NAME__: JSON.stringify(process.env.COMPANY_NAME ? process.env.COMPANY_NAME : 'ONLYOFFICE'),
-      __HELP_URL__: JSON.stringify('https://helpcenter.onlyoffice.com')
+      __HELP_URL__: JSON.stringify(process.env.HELP_URL || 'https://helpcenter.onlyoffice.com')
     }),
     new webpack.BannerPlugin(`\n* Version: ${process.env.PRODUCT_VERSION} (build: ${process.env.BUILD_NUMBER})\n`),
 
@@ -207,6 +211,11 @@ module.exports = {
       skeleton: {
           stylesheet: env === 'development' ? undefined : fs.readFileSync(`../../apps/common/mobile/resources/css/skeleton.css`),
       },
+      system: {
+          env: {
+              defaultLang: JSON.stringify(process.env.DEFAULT_LANG || "en"),
+          }
+      },
     }),
     new CopyWebpackPlugin({
       patterns: [