Fix copy

voicegardens/templates/about.html

@@ -35,18 +35,18 @@
     <h3>2. Note on Browser Permissions & Compatibility</h3>
 
     <p>
-      The site has been successfully tested on Firefox version 72 and Google
+      The site has been successfully tested on Firefox version 72, Google
       Chrome version 79 and Safari 13. Due to browser permission policies, the
       viewer must enable microphone and sound permissions in order for the site
-      function correctly (see images below). We have seen that some mobile browser applications
+      to function correctly (see images below). We have seen that some mobile
-      (such as Firefox) do not immediately request these permissions.
+      browser applications (such as Firefox) do not request these permissions.
       Furthermore, restrictive <a href="https://developers.google.com/web/updates/2017/09/autoplay-policy-changes#webaudio">auto-play policies</a>
       may require that the viewer first interact with the site (for example,
       clicking/touching the "Leaf" button first) before enabling
       microphone/sound permissions. Every effort has been made in the
       development to account for the varied browser permissions ecosystem. For
-      best results, we recommend using a desktop computer or laptop where
+      best results, we recommend using a desktop computer or laptop browser
-      permissions are more easily configured.
+      where permissions are more easily configured.
     </p>
     <img class="perms" src="../static/images/chromeperms.png">
     <img class="perms" src="../static/images/ffoxperms.png">