How to: Running Multiple Firefox Instances

Setting up multiple instances of Firefox is a 5 minute task which is made possible by the creation of separate profiles, whereby each instance of Firefox will use its own profile. A few key points about profiles:

• Every profile has its own set of bookmarks, extensions, themes and browsing history.
• If one instance of Firefox crashes, it will not bring down other instances of Firefox running under different profiles.
• The only thing shared between profiles are the plugins (Java, Flash, etc).
• Separate profiles can be used to run different versions of Firefox at the same time.

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