diff -r 52be94ec8e1c -r 2ae03b1d2797 src/js/widgets/sliceWidget.js
--- a/src/js/widgets/sliceWidget.js	Mon Feb 06 10:56:39 2012 +0100
+++ b/src/js/widgets/sliceWidget.js	Mon Feb 06 11:37:48 2012 +0100
@@ -24,42 +24,21 @@
   var left = this.selector.offset().left;
   var top = this.selector.offset().top;
 
-  // a bug in firefox makes it use the wrong format
-  if (!IriSP.jQuery.browser.mozilla) {
-    // contain the handles correctly - we cannot set
-    // containment: parent because it wouldn't allow to select the 
-    // whole slice, so we have to compute a box in which the slice is
-    // allowed to move.
-    var containment = [left - 8, top, this.selector.width() + left, top];
+  var containment = [left - 8, top, this.selector.width() + left, top];
 
-    // var containment = [left - 16, top, this.selector.width() + left - 8, top];
-    this.leftHandle.draggable({axis: "x",
-    drag: IriSP.wrap(this, this.leftHandleDragged),  
-    containment: containment
-    });
+  // var containment = [left - 16, top, this.selector.width() + left - 8, top];
+  this.leftHandle.draggable({axis: "x",
+  drag: IriSP.wrap(this, this.leftHandleDragged),  
+  containment: "parent"
+  });
 
-    containment = [left, top, this.selector.width() + left, top];
-    // containment = [left, top, this.selector.width() + left - 8, top];
-    this.rightHandle.draggable({axis: "x",
-    drag: IriSP.wrap(this, this.rightHandleDragged),    
-    containment: containment
-    });
+  containment = [left, top, this.selector.width() + left, top];
+  // containment = [left, top, this.selector.width() + left - 8, top];
+  this.rightHandle.draggable({axis: "x",
+  drag: IriSP.wrap(this, this.rightHandleDragged),    
+  containment: "parent"
+  });
   
-  } else { // firefox
-    // we need to define a containment specific to firefox.
-    
-    var containment = [left - 16, top, this.selector.width() + left - 8, top];
-    this.leftHandle.draggable({axis: "x",
-    drag: IriSP.wrap(this, this.leftHandleDragged),  
-    containment: containment
-    });
-
-    containment = [left, top, this.selector.width() + left - 8, top];
-    this.rightHandle.draggable({axis: "x",
-    drag: IriSP.wrap(this, this.rightHandleDragged),    
-    containment: containment
-    });
-  }
   
   this.leftHandle.css("position", "absolute");
   this.rightHandle.css("position", "absolute");