Updating docs a bit.

tools/jprof/README.html

@@ -36,17 +36,19 @@ its time.
 <h3><a name="setup">Setup</a></h3>
 
 First, check out the jprof source code since it is not a part of the
-default SeaMonkeyAll CVS tag.  To do this do:
+default pull.  To do this do:
 <pre>
   cvs co mozilla/tools/jprof
 </pre>
-Next, enable jprof and rebuild mozilla:
-<pre>
-  # jprof needs symbols, do not use --enable-strip-libs
-  ./configure --enable-jprof
-  make
-</pre>
-Now you can run jprof.
+
+<p>Next, configure your mozilla with jprof support by adding
+<code>--enable-jprof</code> to your configure options (eg adding
+<code>ac_add_options --enable-jprof</code> to your <code>.mozconfig</code>) and
+making sure that you do <strong>not</strong> have the
+<code>--enable-strip</code> configure option set -- jprof needs symbols to
+operate.</p>
+
+<p>Finally, build mozilla with your new configuration.  Now you can run jprof.</p>
 
 <h3><a name="usage">Usage</a></h3>
 
@@ -76,11 +78,13 @@ which have the following meanings:
     <li> <b>JP_RTC_HZ=freq</b> : This option, only available on Linux if the
     kernel is built with RTC support, makes jprof use the RTC timer instead of
     using its own timer.  This option, like JP_REALTIME, uses intervals of real
-    time.  This option overrides JP_PERIOD.  freq is the frequency at which the
-    timer should fire, measured in Hz. It must be a power of 2.  The maximal
-    frequency allowed by the kernel can be changed by writing to
+    time.  This option overrides JP_PERIOD.  <code>freq</code> is the frequency
+    at which the timer should fire, measured in Hz. It must be a power of 2.
+    The maximal frequency allowed by the kernel can be changed by writing to
     <code>/proc/sys/dev/rtc/max-user-freq</code>; the maximum value it can be
-    set to is 8192.
+    set to is 8192.  Note that <code>/dev/rtc</code> will need to be readable
+    by the Firefox process; making that file world-readable is a simple way to
+    accomplish that.
 </ul>
 
 <h4>Examples of JPROF_FLAGS usage</h4>