Problems with the abbreviation for CSS for IE and Firefox

ie for CSS magin padding, such as default value of 0px, but FF is not the same, in order to maintain the appearance of uniformity, even if the padding is 0 you have to write, lest FF in the browsing of the dislocation

First
Support for CSS abbreviations: both IE and FF have a bit of a problem with the abbreviations for CSS
For example: BORDER:0XP solid #fff;
Two browser support is not a problem
But if the four side of the magin under different circumstances, it can not use this abbreviation, whether it is IE or FF will appear boundary interpretation error, and resulting in page deformation
Correct abbreviation:
border-width:0px 1px 2px 3px;
Border-style:solid;
Border-color: #fff;
Second
is IE for CSS magin padding, such as the default value of 0px, but FF is not the same, in order to maintain the appearance of uniformity, even if the padding for 0 you also want to write, so as to avoid FF in the browse dislocation.
Third
In IE with body {text-align:center;} You can center the alignment. Firefox is always on the left. But if you add float:right, you can go to the right and you can't get to the middle. FF set the container's left and right outside the patch for auto on it, such as: margin:0 auto;