In default Magento installation, admin area is particularly slow. The reason for this is that admin area can’t use much cache and more database operations. After adding products it becomes even slower. Modifying or adding a new products becomes very slow.
Another good idea to have an optimized css architecture is to avoid hard coding css classes into elements. This allow easy migration to a new theme and reduce code size in document.
FireFox is new number one browser in Europe now. This is very significant event marking end of Internet Explorer dominance in web browsers. If major audience of your web site is from Europe it is recommended that you test your site in FireFox for any errors in display.
There are two ways a CSS style can be applied to a HTML element. One is to apply style by defining it in css file or <style> block. Second one is to provide style definition directly into “style” tag of an element, called inline style definition.