Basic browser extension support

utils/container.go

@@ -0,0 +1,15 @@
+package utils
+
+import (
+	"github.com/aerogo/aero"
+)
+
+// GetContainerClass returns the class for the "container" element.
+// In the browser extension it will get the "embedded" class.
+func GetContainerClass(ctx *aero.Context) string {
+	if ctx.URI() == "/extension/embed" {
+		return "embedded"
+	}
+
+	return ""
+}