Another draft of the overview. Made related changes to the content scripts

chrome/common/extensions/docs/static/content_scripts.html

 <div id="pageData-title" class="pageData">Content Scripts</div>
 <div id="pageData-showTOC" class="pageData">true</div>
 
 <p>
-Content Scripts are JavaScript files that run in the context of web pages.
+Content scripts are JavaScript files that run in the context of web pages.
 By using the standard
 <a href="http://www.w3.org/TR/DOM-Level-2-HTML/">Document
 Object Model</a> (DOM),
 they can read details of the web pages the browser visits,
 or make changes to them.
 </p>
 
 <p>
 Here are some examples of what content scripts can do:
 </p>
 
 <ul>
   <li>Find unlinked URLs in web pages and convert them into hyperlinks
   <li>Increase the font size to make text more legible
   <li>Find and process <a href="http://microformats.org/">microformat</a> data in the DOM
 </ul>
 
 <p>
 However, content scripts have some limitations.
-They <b>cannot use</b>:
+They <b>cannot</b>:
 </p>
 
 <ul>
   <li>
-    chrome.* APIs
+    Use chrome.* APIs
     (except for parts of
     <a href="extension.html"><code>chrome.extension</code></a>)
   </li>
   <li>
-    variables or functions defined by their extension's pages
+    Use variables or functions defined by their extension's pages
   </li>
   <li>
-    variables or functions defined by web pages or by other content scripts
+    Use variables or functions defined by web pages or by other content scripts
+  </li>
+  <li>
+    Make cross-site XMLHttpRequests
   </li>
 </ul>
 
 <p>
 These limitations aren't as bad as they sound.
 Content scripts can <em>indirectly</em> use the chrome.* APIs,
 get access to extension data,
 and request extension actions
 by exchanging <a href="#messaging">messages</a>
 with their parent extension.
@@ skipping 193 matching lines @@
 just like you would any other URL,
 as the following code shows.
 </p>
 
 
 <pre>
 <em>//Code for displaying &lt;extensionDir>/images/myimage.png:</em>
 var imgURL = <b>chrome.extension.getURL("images/myimage.png")</b>;
 document.getElementById("someImage").src = imgURL;
 </pre>