title: unable to resize grids in extjs(3.4) when forcefit = true on fireFox
body: <p>I have these two grids defined in a page. I cannot resize the colums in fireFox. Here is the code, the code has been straightway picked from the extjs examples.</p>
  
  <p>Ext.onReady(function() {</p>
  
  <pre><code>    //console.log("ExtOnReady()");
      Ext.QuickTips.init();
      Ext.MessageBox.maxWidth = 300;
      Ext.Ajax.timeout = 12000000;
  
  
      Ext.QuickTips.init();
  
      // NOTE: This is an example showing simple state management. During development,
      // it is generally best to disable state management as dynamically-generated ids
      // can change across page loads, leading to unpredictable results.  The developer
      // should ensure that stable state ids are set for stateful components in real apps.
      Ext.state.Manager.setProvider(new Ext.state.CookieProvider());
  
      // sample static data for the store
      var myData = [
          ['3m Co',                               71.72, 0.02,  0.03,  '9/1 12:00am'],
          ['Alcoa Inc',                           29.01, 0.42,  1.47,  '9/1 12:00am'],
          ['Altria Group Inc',                    83.81, 0.28,  0.34,  '9/1 12:00am'],
          ['American Express Company',            52.55, 0.01,  0.02,  '9/1 12:00am'],
          ['American International Group, Inc.',  64.13, 0.31,  0.49,  '9/1 12:00am'],
          ['AT&amp;T Inc.',                           31.61, -0.48, -1.54, '9/1 12:00am'],
          ['Boeing Co.',                          75.43, 0.53,  0.71,  '9/1 12:00am'],
          ['Caterpillar Inc.',                    67.27, 0.92,  1.39,  '9/1 12:00am'],
          ['Citigroup, Inc.',                     49.37, 0.02,  0.04,  '9/1 12:00am'],
          ['E.I. du Pont de Nemours and Company', 40.48, 0.51,  1.28,  '9/1 12:00am'],
          ['Exxon Mobil Corp',                    68.1,  -0.43, -0.64, '9/1 12:00am'],
          ['General Electric Company',            34.14, -0.08, -0.23, '9/1 12:00am'],
          ['General Motors Corporation',          30.27, 1.09,  3.74,  '9/1 12:00am'],
          ['Hewlett-Packard Co.',                 36.53, -0.03, -0.08, '9/1 12:00am'],
          ['Honeywell Intl Inc',                  38.77, 0.05,  0.13,  '9/1 12:00am'],
          ['Intel Corporation',                   19.88, 0.31,  1.58,  '9/1 12:00am'],
          ['International Business Machines',     81.41, 0.44,  0.54,  '9/1 12:00am'],
          ['Johnson &amp; Johnson',                   64.72, 0.06,  0.09,  '9/1 12:00am'],
          ['JP Morgan &amp; Chase &amp; Co',              45.73, 0.07,  0.15,  '9/1 12:00am'],
          ['McDonald\'s Corporation',             36.76, 0.86,  2.40,  '9/1 12:00am'],
          ['Merck &amp; Co., Inc.',                   40.96, 0.41,  1.01,  '9/1 12:00am'],
          ['Microsoft Corporation',               25.84, 0.14,  0.54,  '9/1 12:00am'],
          ['Pfizer Inc',                          27.96, 0.4,   1.45,  '9/1 12:00am'],
          ['The Coca-Cola Company',               45.07, 0.26,  0.58,  '9/1 12:00am'],
          ['The Home Depot, Inc.',                34.64, 0.35,  1.02,  '9/1 12:00am'],
          ['The Procter &amp; Gamble Company',        61.91, 0.01,  0.02,  '9/1 12:00am'],
          ['United Technologies Corporation',     63.26, 0.55,  0.88,  '9/1 12:00am'],
          ['Verizon Communications',              35.57, 0.39,  1.11,  '9/1 12:00am'],
          ['Wal-Mart Stores, Inc.',               45.45, 0.73,  1.63,  '9/1 12:00am']
      ];
  
      /**
       * Custom function used for column renderer
       * @param {Object} val
       */
      function change(val) {
          if (val &gt; 0) {
              return '&lt;span style="color:green;"&gt;' + val + '&lt;/span&gt;';
          } else if (val &lt; 0) {
              return '&lt;span style="color:red;"&gt;' + val + '&lt;/span&gt;';
          }
          return val;
      }
  
      /**
       * Custom function used for column renderer
       * @param {Object} val
       */
      function pctChange(val) {
          if (val &gt; 0) {
              return '&lt;span style="color:green;"&gt;' + val + '%&lt;/span&gt;';
          } else if (val &lt; 0) {
              return '&lt;span style="color:red;"&gt;' + val + '%&lt;/span&gt;';
          }
          return val;
      }
  
      // create the data store
      var store = new Ext.data.ArrayStore({
          fields: [
              {name: 'company'},
              {name: 'price',      type: 'float'},
              {name: 'change',     type: 'float'},
              {name: 'pctChange',  type: 'float'},
              {name: 'lastChange', type: 'date', dateFormat: 'n/j h:ia'}
          ]
      });
  
      // manually load local data
      store.loadData(myData);
  
      // create the Grid
      var grid = new Ext.grid.GridPanel({
          store: store,
          columns: [
              {
                  id       :'company',
                  header   : 'Company',
                  width    : 160,
                  sortable : true,
                  dataIndex: 'company'
              },
              {
                  header   : 'Price',
                  width    : 75,
                  sortable : true,
                  renderer : 'usMoney',
                  dataIndex: 'price'
              },
              {
                  header   : 'Change',
                  width    : 75,
                  sortable : true,
                  renderer : change,
                  dataIndex: 'change'
              },
              {
                  header   : '% Change',
                  width    : 75,
                  sortable : true,
                  renderer : pctChange,
                  dataIndex: 'pctChange'
              },
              {
                  header   : 'Last Updated',
                  width    : 85,
                  sortable : true,
                  renderer : Ext.util.Format.dateRenderer('m/d/Y'),
                  dataIndex: 'lastChange'
              },
              {
                  xtype: 'actioncolumn',
                  width: 50,
                  items: [{
                      icon   : '../shared/icons/fam/delete.gif',  // Use a URL in the icon config
                      tooltip: 'Sell stock',
                      handler: function(grid, rowIndex, colIndex) {
                          var rec = store.getAt(rowIndex);
                          alert("Sell " + rec.get('company'));
                      }
                  }, {
                      getClass: function(v, meta, rec) {          // Or return a class from a function
                          if (rec.get('change') &lt; 0) {
                              this.items[1].tooltip = 'Do not buy!';
                              return 'alert-col';
                          } else {
                              this.items[1].tooltip = 'Buy stock';
                              return 'buy-col';
                          }
                      },
                      handler: function(grid, rowIndex, colIndex) {
                          var rec = store.getAt(rowIndex);
                          alert("Buy " + rec.get('company'));
                      }
                  }]
              }
          ],
          stripeRows: true,
          autoExpandColumn: 'company',
          height: 350,
          forceFit:true,
          title: 'Array Grid',
          // config options for stateful behavior
          stateful: true,
          stateId: 'grid'
      });
  
  
  
      var grid1 = new Ext.grid.GridPanel({
          store: store,
          columns: [
              {
                  id       :'company',
                  header   : 'Company',
                  width    : 160,
                  sortable : true,
                  dataIndex: 'company'
              },
              {
                  header   : 'Price',
                  width    : 75,
                  sortable : true,
                  renderer : 'usMoney',
                  dataIndex: 'price'
              },
              {
                  header   : 'Change',
                  width    : 75,
                  sortable : true,
                  renderer : change,
                  dataIndex: 'change'
              },
              {
                  header   : '% Change',
                  width    : 75,
                  sortable : true,
                  renderer : pctChange,
                  dataIndex: 'pctChange'
              },
              {
                  header   : 'Last Updated',
                  width    : 85,
                  sortable : true,
                  renderer : Ext.util.Format.dateRenderer('m/d/Y'),
                  dataIndex: 'lastChange'
              },
              {
                  xtype: 'actioncolumn',
                  width: 50,
                  items: [{
                      icon   : '../shared/icons/fam/delete.gif',  // Use a URL in the icon config
                      tooltip: 'Sell stock',
                      handler: function(grid, rowIndex, colIndex) {
                          var rec = store.getAt(rowIndex);
                          alert("Sell " + rec.get('company'));
                      }
                  }, {
                      getClass: function(v, meta, rec) {          // Or return a class from a function
                          if (rec.get('change') &lt; 0) {
                              this.items[1].tooltip = 'Do not buy!';
                              return 'alert-col';
                          } else {
                              this.items[1].tooltip = 'Buy stock';
                              return 'buy-col';
                          }
                      },
                      handler: function(grid, rowIndex, colIndex) {
                          var rec = store.getAt(rowIndex);
                          alert("Buy " + rec.get('company'));
                      }
                  }]
              }
          ],
          stripeRows: true,
          autoExpandColumn: 'company',
          height: 350,
          title: 'Array Grid',
          // config options for stateful behavior
          stateful: true,
          forceFit:true,
  
          stateId: 'grid'
      });
  
  
      var viewP = new Ext.Viewport({
          autoScroll:true,
          items : [grid,grid1]
      });
  
  
  });
  </code></pre>