Add a note about navigables

index.bs

@@ -2215,7 +2215,16 @@ The [=remote end steps=] with |command parameters| are:
 ## The browsingContext Module ## {#module-browsingContext}
 
 The <dfn export for=modules>browsingContext</dfn> module contains commands and
-events relating to browsing contexts.
+events relating to [=navigables=].
+
+Note: For historic reasons this module is called <code>browsingContext</code>
+rather than <code>navigable</code>, and the protocol uses the term
+<code>context</code> to refer to navigables, particularly as a field in command
+and response parameters.
+
+Issue: Update the spec to use [=navigable=] consistently and remove uses
+of [=/browsing context=]. See
+https://github.com/w3c/webdriver-bidi/issues/91#issuecomment-2144536819.
 
 The progress of navigation is communicated using an immutable <dfn export>WebDriver
 navigation status</dfn> struct, which has the following items: