HTML - Has Firefox Html / Css Guidelines Been Changed?!

p = new createPanel('al','Account Info');
 
p.addButton('images/menu/story.jpg','Story','parent.main.location="background.php"');

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<center>
<object id="MediaPlayer" 
             width="800" 
             height="650" 
             classid="CLSID:22D6f312-B0F6-11D0-94AB-0080C74C7E95" 
             standby="Loading Windows Media Player components..." 
             type="application/x-oleobject" 
             codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=6,4,7,1112"
             title="Pete's Mountain Road Slideshow"
             border="3"> 

<param name="filename" value="http://www.petesmountainroad.com/PetesMountain.wmv" />
<param name="Showcontrols" value="True" />
<param name="autoStart" value="False" />
<param name="wmode" value="transparent" />

<embed type="application/x-mplayer2" src=http://www.petesmountainroad.com/PetesMountain.wmv" 
              name="MediaPlayer" 
              autoStart="False" 
              wmode="transparent" 
              width="800" 
              height="650"
              title="Pete's Mountain Road Slideshow"  />
</object>
<br />
<p class="main">If you do not have Windows Media Player, you can view the video by following 
<a class="Link" href="http://www.microsoft.com/windows/windowsmedia/player/11/default.aspx" target="_blank" title="Download Windows Media Player 11">this link</a> 
to download the program to your computer, then try to play it again.</p>
</center>
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<div id="indexHtml1" style="position:absolute;left:430px;top:200px;width:700px;z-index:80">
<div xmlns:v="http://rdf.data-vocabulary.org/#" typeof="v:Recipe">
   <font face="Arial" font size="1" color="#8B000">
   <h1 property="v:name">Chicken Lo Mein</h1></font><br><br><br>
<img src="/images/Lo_Mein2.jpg" style="position:absolute;top:80%;left:1%;margin:-83px 0px 0px -200px;" rel="v:photo" width="130" height="110" right="300"color="#8B000"/>  


<font face="Arial" font size="1px">
<div style="position:absolute;left:1px;top:38px;width:700px;z-index:60;>

<span property="v:summary">Boiled Chinese noodles, in a tangy sauce,</span><br/>
   <span property="v:summary">stri fried with Chinese vegetable.</span><br/><br/><br/>
<br/>
<br/>
<font face="Arial" font size="3px">
<div style="position:absolute;right:195px;width:700px;top:90;z-index:60>
By: <span property="v:author">Photo by: Suat Eman</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
     <span rel="v:Review">
      <span typeof="v:Review-aggregate">
         <span rel="v:rating">
            <span typeof="v:Rating">
               <span property="v:average">4.0</span> stars based on 
               <span property="v:count">35</span> reviews
            </span>
         </span>
      </span>
   </span> 
<br/>
<br/>
<font face="Arial" font size="2px">
<div right:200px;width:700px;z-index:60;>
 Prep time: <span property="v:prepTime" content="PT30M">30 min</span>&nbsp;&nbsp;
   Cook time: <span property="v:cookTime" content="PT1H">30 min</span>&nbsp;&nbsp;
   Total time: <span property="v:totalTime" content="PT1H30M">30 min</span>&nbsp;&nbsp;
   Servings: <span property="v:yield">6</span><br/> 

<br/>
<br/>
<br/>

<font face="Arial" font size="3px">
    <span rel="v:ingredient">
      <span typeof="v:Ingredient"> 
         <span property="v:amount">1/2 lb</span>:   
         <span property="v:name">Chinese noodles</span>
<br/> 
         <span property="v:amount">1/2 lb</span>:   
         <span property="v:name">Cooked chicken (chunked), shrimp or pork</span>  
<br/>   
         <span property="v:amount">1 bunch</span>:   
         <span property="v:name">fresh green scallions</span>     
<br/>   
         <span property="v:amount">1 knob</span>:   
         <span property="v:name"> fresh ginger</span>
<br/> 
         <span property="v:amount">3-4</span>:   
         <span property="v:name">cloves garlic</span>  
<br/>   
         <span property="v:amount">1 lb</span>:   
         <span property="v:name">bean sprouts</span>     
<br/>   
         <span property="v:amount">1/2 cup</span>:   
         <span property="v:name">pea pods</span>
<br/> 
         <span property="v:amount">1/2 cup</span>:   
         <span property="v:name">shredded Chinese cabbage</span>  
<br/>   
         <span property="v:amount">2 1/2 tablespoons</span>:   
         <span property="v:name">soy sauce</span>     
<br/>   
         <span property="v:amount">2 1/2 tablespoons</span>:   
         <span property="v:name">hosin sauce</span>
<br/> 
         <span property="v:amount">1 teaspoon</span>:   
         <span property="v:name">cornstarch</span>  
<br/>   
         <span property="v:amount">1/4 tablespoons</span>:   
         <span property="v:name">sea salt</span>     
<br/>   
         <span property="v:amount">3 tablespoons</span>:   
         <span property="v:name">peanut oil</span>
<br/>   
         <span property="v:amount">1 tablespoon</span>:   
         <span property="v:name">dry sherry</span>
     </span>
  
<br/> 
<br/> 
<br/>
<br/>
   <div property="v:instructions">
   1. Boil noodles according to package directions; rinse briefly under cold<br/>
        water and drain set aside.<br/> 
   2.Slice scallions lengthwise then into 1 inch longs pieces.<br/> 
       Wash and peel ginger, then grate using a fine grater.<br/> 
       Peel and finely mince garlic. Wash bean sprouts well in cold running water.<br/>  
   3.In a small bowl, combine soy and oyster sauce, salt and cornstarch.<br/>  
   4.Heat peanut oil in a large wok or skillet until sizzling hot.<br/>
       Add pork, onion and ginger, stirring constantly for 1 minute.<br/> 
       Add garlic, and sherry; stir in bean sprouts<br/>
      (and other vegetables and shrimp, if using) and soy sauce mixture.<br/>  
   5.Quickly stir in noodles and stir fry for 3 minutes<br/> 

</div>
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