Examples: Emscripten: fixes minor rendering issues (#9281) - in Firefox, scrollbar would appear => adding overflow: hidden fixes this issue - when the canvas has the focus, Chrome draws a very small blue outline, setting it to none fixes this issue

diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index fba7c64..7aac388 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt

@@ -99,6 +99,9 @@
   - Emscripten: added `tabindex=-1` to canvas in our shell_minimal.htm. Without it,
     the canvas was not focusable in the DOM, which in turn make some backends
     (e.g. pongasoft/emscripten-glfw) not receive focus loss events. (#9259) [@pthom]
+  - Emscripten: fixed minor rendering issues with our HTML shell. (#9281) [@ypujante]
+    - hidden small blue outline when canvas is focused on Chrome.
+    - hidden scrollbar in Firefox.
   - WebGPU: fixed undefined behaviors in example code for requesting adapter
     and device. (#9246, #9256) [@r-lyeh]
   - GLFW/SDL2/SDL3+WebGPU: removed suport for Emscripten <4.0.10. (#9281) [@ypujante]

diff --git a/examples/libs/emscripten/shell_minimal.html b/examples/libs/emscripten/shell_minimal.html
index bcc5834..939dc17 100644
--- a/examples/libs/emscripten/shell_minimal.html
+++ b/examples/libs/emscripten/shell_minimal.html

@@ -5,7 +5,7 @@
     <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no"/>
     <title>Dear ImGui Emscripten example</title>
     <style>
-        body { margin: 0; background-color: black }
+        body { margin: 0; background-color: black; overflow: hidden; }
         /* FIXME: with our GLFW example this block seems to break resizing and io.DisplaySize gets stuck */
         .emscripten {
             position: absolute;
@@ -26,6 +26,9 @@
             image-rendering: pixelated;
             -ms-interpolation-mode: nearest-neighbor;
         }
+        #canvas:focus {
+          outline: none;
+        }
     </style>
   </head>
   <body>