Different browser modes
To ensure backward compatibility with older browsers, browser creators had different modes for sites that work for different browser specifications
* Standard mode in Browser:
Browser renders a page according to the specifications set
* Quirks mode in Browser:
Browser loosely renders the page and manipulates the box model differently which happens to be in sites built for IE 5.5 (and lesser versions) or Opera 7 browsers
* Almost standard mode in Browser:This is a mode in Firefox/Safari browsers where they handle the tables quite differently from standard mode
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