title: Hello world application not working in Firefox 7.0.1
body: <p>I am not able to open Hello world application in Firefox 7.0.1. I am developing this app using <a href="http://docs.sencha.com/ext-js/4-0/#!/guide/getting_started" rel="nofollow">this</a> tutorial from Sencha documentation.When I opened Firefox Web Developer Console, I found following CSS errors :</p>
  
  <pre><code>Unknown property 'box-sizing'.  Declaration dropped. @ http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Unknown property 'zoom'.  Declaration dropped. @ http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for 'filter'.  Declaration dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Unknown property 'user-select'.  Declaration dropped. @ http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for 'cursor'.  Declaration dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Expected declaration but found '*'.  Skipped to next declaration. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for 'background-image'.  Declaration dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Unknown property '-moz-outline'.  Declaration dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Expected color but found 'null'.  Error in parsing value for 'color'.   Declaration dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Expected color but found 'null'.  Error in parsing value for  'border-bottom-color'.  Declaration dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for '-moz-border-radius-bottomleft'.  Declaration  dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for 'border-bottom-left-radius'.  Declaration  dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for '-moz-border-radius-bottomright'.   Declaration dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for 'border-bottom-right-radius'.  Declaration  dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for '-moz-border-radius-topleft'.  Declaration  dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for 'border-top-left-radius'.  Declaration  dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for '-moz-border-radius-topright'.  Declaration  dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Error in parsing value for 'border-top-right-radius'.  Declaration  dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Unknown property 'behavior'.  Declaration dropped. @ http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  Expected color but found 'invert'.  Error in parsing value for  'outline'.  Declaration dropped. @  http://localhost:8080/ExtJs/HelloWorld/extjs/resources/css/ext-all.css:1
  </code></pre>
  
  <p>I would like to know why these many errors are coming and how to resolve these errors?</p>