Changed browser's img alt text

Just a minor fix

browserWarning.html

@@ -17,9 +17,9 @@
 	A Dark Room makes use of HTML5 and CSS3, which your current browser does not appear to support.<br/>
 	Please update your browser for the best experience:<br/>
 	</strong>
-	<a href='http://www.mozilla.org/en-US/firefox/new/'><img src='img/firefox.png' alt='Firefox' /></a>
-	<a href='https://www.google.com/intl/en/chrome/browser/'><img src='img/chrome.png' alt='Firefox' /></a>
-	<a href='http://windows.microsoft.com/en-CA/internet-explorer/download-ie'><img src='img/ie.png' alt='Firefox' /></a>
+	<a href='http://www.mozilla.org/en-US/firefox/new/'><img src='img/firefox.png' alt='Firefox' title='Firefox' /></a>
+	<a href='https://www.google.com/intl/en/chrome/browser/'><img src='img/chrome.png' alt='Chrome' title='Chrome' /></a>
+	<a href='http://windows.microsoft.com/en-CA/internet-explorer/download-ie'><img src='img/ie.png' alt='Internet Explorer' title='Internet Explorer' /></a>
 	<br/><br/>
 	Or you can <a href='index.html?ignorebrowser=true'>play anyway</a>, but it probably won't work!
 	</div>