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What are the basic differences differences between the browsers powered by Gecko and by those powered by Webkit?

I wanted to know about the basic differences between the browsers powered by Gecko and Webkit? - Are there any differences in the way they render? - Any difference in the mechanism they use to render?

Any other differences?

Solution
    • Gecko and Webkit are different rendering engines.
    • Yes, they use somewhat different rendering mechanisms.
    • Yes, the results sometimes look different, though that usually indicates a bug in either WebKit or Gecko or both.
    • Gecko-based browsers use SpiderMonkey as their JavaScript engine, while WebKit-based ones use either JavaScriptCore or V8.
    • Different browsers use different networking libraries (Gecko-based ones use necko, while WebKit-based ones use a variety of different libraries).