diff --git a/data/web/corefork.telegram.org/api/bots/webapps.html b/data/web/corefork.telegram.org/api/bots/webapps.html
index 768f975496..537c276b93 100644
--- a/data/web/corefork.telegram.org/api/bots/webapps.html
+++ b/data/web/corefork.telegram.org/api/bots/webapps.html
@@ -154,7 +154,13 @@
 <p>Bot web apps can be themed according to the following theme parameters, passed as a JSON object to the <code>theme_params</code> parameter of the <a href="/method/messages.requestSimpleWebView">messages.requestSimpleWebView</a> and <a href="/method/messages.requestWebView">messages.requestWebView</a> methods.  </p>
 <p>This JSON object has the the following keys, containing color theme information (hex string, RGB, no alpha) to pass to the web app:</p>
 <ul>
-<li><code>bg_color</code> - Background color <br><em> <code>secondary_bg_color</code> - Secondary background color <br></em> <code>text_color</code> - Text color <br><em> <code>hint_color</code> - Hint text color <br></em> <code>link_color</code> - Link color <br><em> <code>button_color</code> - Button color <br></em> <code>button_text_color</code> - Button text color</li>
+<li><code>bg_color</code> - Background color</li>
+<li><code>secondary_bg_color</code> - Secondary background color</li>
+<li><code>text_color</code> - Text color</li>
+<li><code>hint_color</code> - Hint text color</li>
+<li><code>link_color</code> - Link color</li>
+<li><code>button_color</code> - Button color</li>
+<li><code>button_text_color</code> - Button text color</li>
 </ul></div>
   
 </div>
diff --git a/data/web/corefork.telegram.org/api/web-events.html b/data/web/corefork.telegram.org/api/web-events.html
index 945835c366..573241558c 100644
--- a/data/web/corefork.telegram.org/api/web-events.html
+++ b/data/web/corefork.telegram.org/api/web-events.html
@@ -147,7 +147,7 @@ The web app must also be expanded when the user swipes up on the webview.  </p>
 <p>This event must be ignored <em>during</em> a user swipe down, used to reduce the webview.</p>
 <h4><a class="anchor" href="#web-app-request-viewport" id="web-app-request-viewport" name="web-app-request-viewport"><i class="anchor-icon"></i></a><code>web_app_request_viewport</code></h4>
 <p>No event payload.</p>
-<p>Used by web apps to request information about the viewport, clients should emit a <a href="/api/bots/webapps#viewport-changed">viewport_changed event</a></p>
+<p>Used by web apps to request information about the viewport, clients should emit a <a href="/api/bots/webapps#viewport-changed">viewport_changed event</a>.</p>
 <h4><a class="anchor" href="#web-app-request-theme" id="web-app-request-theme" name="web-app-request-theme"><i class="anchor-icon"></i></a><code>web_app_request_theme</code></h4>
 <p>No event payload.</p>
 <p>Used by web apps to request information about the current theme, clients should emit a <a href="/api/bots/webapps#theme-changed">theme_changed event</a>.</p>
@@ -166,6 +166,8 @@ The web app must also be expanded when the user swipes up on the webview.  </p>
 <li><code>is_progress_visible</code> - Indicates whether the button should display a loading indicator (boolean, false by default)</li>
 </ul>
 <p>Configures the main button, located immediately below the webview: when the user presses it a <a href="/api/bots/webapps#main-button-pressed"><code>main_button_pressed</code> event should be emitted by the client</a>.  </p>
+<p>Note that if <code>is_visible</code> is true, <em>only when opening web apps from the <a href="/api/bots/attach">attachment menu</a></em> and <em>only on clients with tab bars</em>, the main button should be displayed only after the first user tap inside of the webview (to prevent bots from immediately blocking the tab bar).<br>
+Otherwise, the main button can be displayed right away if <code>is_visible</code> is true.  </p>
 <h4><a class="anchor" href="#web-app-setup-back-button" id="web-app-setup-back-button" name="web-app-setup-back-button"><i class="anchor-icon"></i></a><code>web_app_setup_back_button</code></h4>
 <p>Event data: a JSON object with an <code>is_visible</code> boolean field.</p>
 <p>Determines whether to show or hide the back button: when the user presses it a <a href="/api/bots/webapps#back-button-pressed"><code>back_button_pressed</code> event should be emitted by the client</a>.<br>