【正文】 equivalent to the pack attribute. It specifies where child elements of the box are placed when the box is larger that the size of the children. For boxes with horizontal orientation, it is used to indicate the position of children horizontally. For boxes with vertical orientation, it is used to indicate the position of children vertically. The mozboxalign attribute is used to specify the position in the opposite direction.start: Child elements are placed starting from the left or top edge of the box. If the box is larger than the total size of the children, the extra space is placed on the right or bottom side. center: Extra space is split equally along each side of the child elements, resulting the children being placed in the center of the box. end: Child elements are placed on the right or bottom edge of the box. If the box is larger than the total size of the children, the extra space is placed on the left or top side. mozboxsizingThis property determines how the width and height of the element is calculated. It affects the width and height properties.contentbox: The width and height properties specify the size of the element including the padding. borderbox: The width and height properties specify the size of the element including the padding and border. paddingbox: The width and height properties specify the size of the element. The padding, border and margin are added outside of this size. mozimageregionFor elements that have an image, this property sets the area of the image that is used. You can set multiple elements to use the same image but use a different region of the image, reducing the amount of memory required. You can change this property to simulate animation. The syntax is similar to the clip property. All four values are relative to the upper left corner of the image. mozimageregion: rect(top, right, bottom, left)。 Specifies how the background image of an inline element is determined when the content of the inline element wraps onto multiple lines.boundingbox: continuous: The background image wraps around on to each line as if the text had no line breaks. For example, if the image is 500 pixels and the inline box is 300 pixels, the first 300 pixels of the image appears on the first line, and the last 200 pixels followed by the first 100 pixels of the image appear on the second line. The image repeats until the end of the content. eachbox: mozbackgroundorigins system draws such elements. This currently only has an effect on Windows XP and Mac OS X.mozbackgroundclip網上搜集的FireFox專用css第一部分：原文地址：mozappearanceUsed to cause an element to take its border, background style and size from the operating system39。s theme. This causes XUL elements to be drawn similar to the way the user39。 Indicates whether the background, either the color or image, should extend into the border area of the element. This property is similar to the CSS3 backgroundclip property.border: The background extends into the border of the element. It will be drawn behind the border. padding: The background does not extend into the border. mozbackgroundinlinepolicy Determines how the backgroundposition property is determined. This property is similar to the CSS3 backgroundorigin property.content: The p