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I use firefox 3.6.1 on a mac os 10.5.8. What is the difference between this and firefox 6?

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As I mentioned, I am running 3.6.1 and am when I go to the firefox website I get the message that I am using an old version and am asked to update to the latest which appears to be 6.0. Is this an update to 3.6.1? When researching on the web, I see that 6 is an update to version 5. So, is the update for me or is it a different version altogether?

Thanks

As I mentioned, I am running 3.6.1 and am when I go to the firefox website I get the message that I am using an old version and am asked to update to the latest which appears to be 6.0. Is this an update to 3.6.1? When researching on the web, I see that 6 is an update to version 5. So, is the update for me or is it a different version altogether? Thanks

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Yes, 6.0 is an update for 3.6.1. The 3.6.x versions were followed by 4.0 in March 2011, then 5.0 in June which was an update for 4.0, and 6.0 an update for 5.0 in August.

Mozilla moved Firefox to a fast release system this past spring, quicker releases with fewer changes per release. Instead of users having to wait for a new feature to be added in 10 to 14 months under the old release system, a new feature is added to a release like 12 weeks after the new feature is deemed to be complete and ready for release.