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when I try to open version 4 it tells me I cannot use with my OS X. My OS is 10.4.11. If it was not compatible why did it load???? Now I can't restore to 3.6

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I just updated my Firefox to 4 and it will not work. When I try to go to web and browse it tells me "You cannot use the application "Firefox with this version of Mac OS X. If that is the case, why did it load and allow me to replace my older version of Firefox? Now I cannot find the older version to reload and am very upset. There are some things that I do online that will not operate with Safari. Firefox 4 will NOT OPEN.

I just updated my Firefox to 4 and it will not work. When I try to go to web and browse it tells me "You cannot use the application "Firefox with this version of Mac OS X. If that is the case, why did it load and allow me to replace my older version of Firefox? Now I cannot find the older version to reload and am very upset. There are some things that I do online that will not operate with Safari. Firefox 4 will NOT OPEN.

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Firefox 4 requires at least OS X 10.5 and an Intel Mac.

You can look at:

Firefox 3.6.x can be found here: