diff --git a/docs/browsers.md b/docs/browsers.md
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+# Unsupported configuration
+
+[codethemicrobit.com](https://codethemicrobit.com) doesn't currently support
+your browser or operating system. The following configurations are supported:
+
+## Windows
+
+You need one of these browsers running on Windows 7, Windows 8, Windows 8.1, or
+Windows 10:
+
+* Internet Explorer 11
+* Microsoft Edge
+* Google Chrome
+* Mozilla Firefox
+
+## Mac
+
+You need one of these browsers running on OS X 10.9 Mavericks, OS X 10.10
+Yosemite, OS X 10.11 El Capitan, or macOS 10.12 Sierra:
+
+* Safari
+* Google Chrome
+* Mozilla Firefox
+
+## Linux
+
+If you're using a Raspberry Pi, please see [the documentation
+here](/raspberry-pi).
+
+You need to be running a Linux distribution recent enough to run the most recent
+version of one of the following:
+
+* Google Chrome, or Chromium
+* Mozilla Firefox, Iceweasel, or Seamonkey
+
+## How to check your OS or browser
+
+### Windows
+
+* Click on the Start menu
+* Type 'System'
+* Click on the app called 'System'
+* The version of Windows you are using will be displayed:
+
+![](/static/configurations/windows-version.png)
+
+### Mac
+
+* Click on the Apple icon in the top left
+* Click on 'About this Mac'
+* This window will be displayed:
+
+![](/static/configurations/osx-version.png)
+
+### Internet Explorer
+
+* Click on the Settings icon in the top right
+* Click 'About Internet Explorer'
+* This window will be displayed:
+
+![](/static/configurations/ie-version.png)
+
+### Edge
+
+Edge automatically updates, so you should always be using the latest version
+
+* Click on the menu icon in the top right (three dots)
+* Scroll to the bottom
+* Information similar to the following will be displayed:
+
+![](/static/configurations/edge-version.png)
+
+### Google Chrome
+
+Google Chrome automatically updates, so you should always be using the latest version
+
+* Click on the menu icon in the top right (three dots)
+* Click Help, and About Google Chrome
+* Information similar to the following will be displayed:
+
+![](/static/configurations/chrome-version.png)
+
+### Firefox
+
+Firefox automatically updates, so you should always be using the latest version
+
+* Click on the menu icon in the top right (three horizontal lines)
+* Click the question mark icon (help button)
+* Click 'About Firefox'
+
+![](/static/configurations/firefox-version.png)
+
+### Safari
+
+Safari updates when your operating system updates, so if you are using the
+latest version of OS X then you'll be using the latest version of Safari.
+
+* Click on the Safari menu in the top left
+* Click 'About Safari'
+
+![](/static/configurations/safari-version.png)
diff --git a/docs/browsers/linux.md b/docs/browsers/linux.md
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+# Unsupported configuration
+
+As you are using Linux, it is recommended that you use Mozilla Firefox or Google
+Chrome.
+
+Please see [here](/browsers) for more information.
diff --git a/docs/browsers/mac.md b/docs/browsers/mac.md
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+++ b/docs/browsers/mac.md
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+# Unsupported configuration
+
+As you are using OS X, it is recommended that you use Safari. Alternatively,
+Google Chrome and Mozilla Firefox are also supported.
+
+Please see [here](/browsers) for more information.
diff --git a/docs/browsers/windows.md b/docs/browsers/windows.md
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+# Unsupported configuration
+
+As you are using Windows, it is recommended that you use Microsoft Edge. If you
+are running a version of Windows prior to Windows 10, you can use Internet
+Explorer 11. Alternatively, Google Chrome and Mozilla Firefox are also
+supported.
+
+Please see [here](/browsers) for more information.
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diff --git a/pxtarget.json b/pxtarget.json
index 5e42c7a3..dfc84806 100644
--- a/pxtarget.json
+++ b/pxtarget.json
@@ -116,6 +116,33 @@
         "privacyUrl": "https://go.microsoft.com/fwlink/?LinkId=521839",
         "termsOfUseUrl": "https://go.microsoft.com/fwlink/?LinkID=206977",
         "githubUrl": "https://github.com/Microsoft/pxt-microbit",
+        "browserSupport": [
+            {
+                "name": "unsupported",
+                "os": "*",
+                "path": "/browsers"
+            },
+            {
+                "name": "unsupported",
+                "os": "mac",
+                "path": "/browsers/mac"
+            },
+            {
+                "name": "unsupported",
+                "os": "linux",
+                "path": "browsers/linux"
+            },
+            {
+                "name": "unsupported",
+                "os": "rpi",
+                "path": "/raspberry-pi"
+            },
+            {
+                "name": "unsupported",
+                "os": "windows",
+                "path": "/browsers/windows"
+            }
+        ],
         "boardName": "BBC micro:bit",
         "docMenu": [
             {