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From yesterday unable to launch Firefox 3.6. Also Firefox beta. Receiving such a message: "TypeError: Components.classes['@mozilla.org/extensions/manager;1'] is undefined"

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  • 12 have this problem
  • Last reply by TonyE

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I am using Acer Aspire 5542g and having had any troubles with brousers. Suddenly from yesterday I am unable to launch Firefox brouser.

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That is usually caused by an incompatible add-on. Try the procedure in the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article.