nit

fetch.bs

@@ -1236,7 +1236,7 @@ not always relevant and might require different behavior.
    <td>CSP, NEL reports.
   <tr>
    <td>"<code>document</code>"
-   <td>HTML's navigate algorithm.
+   <td>HTML's navigate algorithm (top-level only).
   <tr>
    <td>"<code>frame</code>"
    <td><code>child-src</code>
@@ -3265,8 +3265,8 @@ the request.
      <li><p>Let <var>value</var> be `<code>*/*</code>`.
 
      <li>
-      <p>Otherwise, a user agent should set <var>value</var> to the first matching statement, if
-      any, switching on <var>request</var>'s <a for=request>destination</a>:
+      <p>A user agent should set <var>value</var> to the first matching statement, if any, switching
+      on <var>request</var>'s <a for=request>destination</a>:
       <!-- https://github.com/whatwg/fetch/issues/43#issuecomment-97909717 -->
 
       <dl class=switch>