diff --git a/index.html b/index.html
index a756f0d..a803a2c 100644
--- a/index.html
+++ b/index.html
@@ -398,8 +398,8 @@ <h2>The <dfn>IdleDeadline</dfn> interface</h2>
       "Privacy and Security" section of [[HR-TIME]]. This value is calculated
       by performing the following steps:</p>
       <ol>
-        <li>Let <var>now</var> be a {{DOMHighResTimeStamp}} representing
-        <a>current high resolution time</a> in milliseconds.</li>
+        <li>Let <var>now</var> be the [=coarsened shared current time=] given
+        [=this=]'s [=relevant settings object=]'s [=environment settings object/cross-origin isolated capability=].</li>
         <li>Let <var>deadline</var> be the result of calling {{IdleDeadline}}'s <a>get deadline time</a> algorithm.</li>
         <li>Let <var>timeRemaining</var> be <var>deadline</var> -
         <var>now</var>.</li>
@@ -466,7 +466,8 @@ <h2>Invoke idle callbacks algorithm</h2>
       <ol>
         <li>If the user-agent believes it should end the idle period early due
         to newly scheduled high-priority work, return from the algorithm.
-        <li>Let <var>now</var> be the current time.</li>
+        <li>Let <var>now</var> be the [=coarsened shared current time=] given
+        <var>window</var>'s [=relevant settings object=]'s [=environment settings object/cross-origin isolated capability=].</li>
         <li>If <var>now</var> is less than the result of calling <var>getDeadline</var> and the
         <var>window</var>'s <a>list of runnable idle callbacks</a> is not empty:
           <ol>
@@ -502,7 +503,8 @@ <h2>Invoke idle callback timeout algorithm</h2>
             <li>Remove <var>callback</var> from both <var>window</var>'s <a>list
             of idle request callbacks</a> and the <a>list of runnable idle
             callbacks</a>.</var></li>
-            <li>Let <var>now</var> be the current time.</li>
+            <li>Let <var>now</var> be the [=coarsened shared current time=] given
+            <var>window</var>'s [=relevant settings object=]'s [=environment settings object/cross-origin isolated capability=].</li>
             <li>Let <var>deadlineArg</var> be a new <a>IdleDeadline</a>.
             Set the <a>get deadline time</a> algorithm associated with <var>deadlineArg</var> to
             an algorithm returning <var>now</var> and set the <a>timeout</a> associated with