diff --git a/fetch.bs b/fetch.bs
index 7c6851f05..52a085c15 100644
--- a/fetch.bs
+++ b/fetch.bs
@@ -2128,6 +2128,11 @@ Unless stated otherwise, it is false.
 
 <p class=note>This is for exclusive use by HTML's navigate algorithm. [[!HTML]]
 
+<p>A <a for=/>request</a> has an associated <dfn export for=request>navigation
+id</dfn> (a string). Unless stated otherwise, it is null.
+
+<p class=note>This is for exclusive use by HTML's navigate algorithm. [[!HTML]]
+
 <p>A <a for=/>request</a> has an associated boolean <dfn export for=request>render-blocking</dfn>.
 Unless stated otherwise, it is false.
 
@@ -2169,6 +2174,15 @@ otherwise, it is unset.
 <a for=request>done flag</a>, and <a for=request>timing allow failed flag</a> are used as
 bookkeeping details by the <a for=/>fetch</a> algorithm.
 
+<p>A <a for=/>request</a> has an associated
+<dfn export for=request id=concept-request-id>request id</dfn> which is a unique
+string automatically set when the <a for=/>request</a> is created.
+
+Note: the [=request/request id=] is used by WebDriver-BiDi. It remains constant
+across all requests resulting from a redirect of an initial request. When a
+request is [=request/cloned=], the created request gets a unique
+[=request/request id=]. [[!WEBDRIVER-BIDI]]
+
 <hr>
 
 <p>A <dfn export>subresource request</dfn> is a <a for=/>request</a>
@@ -2245,7 +2259,10 @@ is to return the result of <a>serializing a request origin</a> with <var>request
 
 <ol>
  <li><p>Let <var>newRequest</var> be a copy of <var>request</var>, except for its
- <a for=request>body</a>.
+ <a for=request>body</a> and <a for=request>request id</a>.
+
+ <li><p>Let <var>newRequest's</var> <a for=request>request id</a> be a new
+ unique string.
 
  <li><p>If <var>request</var>'s <a for=request>body</a> is non-null, set <var>newRequest</var>'s
  <a for=request>body</a> to the result of <a lt=clone for=body>cloning</a> <var>request</var>'s
@@ -4785,6 +4802,11 @@ steps:
      <a for=request>URL</a>, <var>fetchParams</var>'s <a for="fetch params">request</a>'s
      <a for=request>initiator type</a>, <var>global</var>, <var>cacheState</var>,
      <var>bodyInfo</var>, and <var>responseStatus</var>.
+
+     <li><p>If <var>response</var> is a <a>network error</a>, run
+     the <a>WebDriver BiDi fetch error</a> steps with <var>request</var>. Otherwise
+     run the <a>WebDriver BiDi response completed</a> steps with
+     <var>request</var> and <var>response</var>.
     </ol>
 
    <li>
@@ -5139,6 +5161,13 @@ these steps:
      <a>filtered response</a>; otherwise to <var>response</var>'s
      <a for="filtered response">internal response</a>.
 
+     <!-- Service Workers is responsible for emmitting the WebDriver BiDi
+          request events in this case. That's necessary to ensure that the events are
+          only generated if the service worker will handle the fetch, and to get the
+          correct event ordering in the case of network fallback -->
+     <li><p>Run the [=WebDriver BiDi response started=] steps with
+     <var>request</var> and <var>response</var>.
+
      <li>
       <p>If one of the following is true
 
@@ -5673,6 +5702,10 @@ run these steps:
     <p class=note>This intentionally does not depend on <var>httpRequest</var>'s
     <a for=request>credentials mode</a>.
 
+   <!-- After this point the request is not further modified before being either
+        retrieved from the cache or sent -->
+   <li><p>Run the <a>WebDriver BiDi before request sent</a> steps with <var>request</var>.
+
    <li><p>Set <var>httpCache</var> to the result of <a>determining the HTTP cache partition</a>,
    given <var>httpRequest</var>.
 
@@ -5768,6 +5801,8 @@ run these steps:
  <li><p><a>If aborted</a>, then return the <a for=/>appropriate network error</a> for
  <var>fetchParams</var>.
 
+ <li><p>If <var>response</var> is not null, run the <a>WebDriver BiDi response
+ started</a> steps with <var>request</var> and <var>response</var>.
 
  <!-- If response is still null, we require a forwarded request. -->
  <li>
@@ -6031,6 +6066,9 @@ optional boolean <var>forceNewConnection</var> (default false), run these steps:
 
        <li><p>Wait until all the HTTP response headers are transmitted.
 
+       <li><p>Run the [=WebDriver BiDi response started=] steps with
+       |request| and |response|.
+
        <li><p>Let <var>status</var> be the HTTP response's status code.
 
        <li>