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Quite often I find myself on instead of the 'usual' launchpad. It looks exactly the same as traditional launchpad, so I wonder if there is any difference. This happens usually when I go to launchpad by clicking a link on a third party website. Somehow people prefer to link to the edge subdomain of launchpad, or at least I have such impression.

So what exactly is the And why some people prefer it than the usual

Looking for information I was always redirected to and , but I didn't find there anything about edge. I guess it may be something like a testing environment, if yes, than how does it differ from and

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up vote 6 down vote accepted

There is absolutely no difference between and It used to be used for easy testing of new Launchpad code, but is now deprecated.

Back in the olden days (well about twelve months ago) then anyone could join a special group on Launchpad. If you were a member of this testing group then whenever you visited you were automatically redirected to Because of this automatic redirection, a lot of people forgot about it, and posted links to all over the place. Although this wasn't harmful (anyone could go test on I can see people being confused by it.

For some reason they've let the domain hang around for a while, to be honest they've probably just forgotten about turning it off (well redirecting everyone back to

Anyway, the point is that right now, you get exactly the same results whether you view edge or the main domain.

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It was something like testing environment -- and members of launchpad-beta-testers had this by default, but it's now deprecated --

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