I just downloaded Aurora, but I've heard that using another version could damage my profile?

I have a desktop computer and a laptop. I installed Firefox 4 on both, but today I decided to install Aurora on the desktop and I plan on installing all night on my laptop. My plan is to use the latest versions as my default browser and Firefox 4, if a site does not work. I have Sync configured to synchronize everything between the two computers.
I read on several websites that since each version uses the same profile, very bad things could happen to this profile, if you use different versions on the same machine.
Is this true for my situation? Would be my favorites or passwords or anything either be lost or damaged? Sync syncs my information for all the different versions?
For example, is it OK to run every night on my laptop and Aurora on my desk and use Firefox 4 when necessary and have Sync sync my passwords and other information?

I hope this makes sense. Thank you very much for your help!

Do a custom installation and install each version in its own folder in program using several versions of Firefox.

Create a new profile exclusively for each version of Firefox and create a shortcut on the desktop with Pei 'profile' attached to the target to launch each version of Firefox with its own profile.

See these articles for more information mozillaZine KB:

Tags: Firefox

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