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Did Firefox's rendering engine change between versions 4/5 and version 6?

When I go to a highly graphical site like with Firefox 6, it seems that the initial access takes a lot longer than it used to, and then the whole site is all on screen at once. The same site in Chrome 13 loads like I am used to: fast initial access, with the elements appearing as they are loaded.

Basically, I'm wondering why the Internet seems slower than it did a few days ago.

I'm using Firefox 6.0.1 on a white Macbook that runs OS X Snow Leopard.

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up vote 1 down vote accepted

I don't think they changed it. I think they have upgraded it. Firefox 6 is using Gecko 6.0.

Refer the following links for all the changes.

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Thanks for the links. Looking through them, I do not recognise anything specifically related to my question, but since your's is the only answer, and the links should be relevant, I accept it. – mplungjan Sep 5 '11 at 6:08

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