This article describes why Firefox may start in Safe Mode when you expect it to start normally.
If you started Firefox in Safe Mode, it will remain in Safe Mode until Firefox is completely closed. The easiest way to make sure Firefox is closed is to restart your computer. Once your computer starts up again, start Firefox.
You may have updated the shortcut you use to start Firefox to open it in Safe Mode and forgotten to change it back.
Windows will list in the Start Menu the applications you have most recently opened. Firefox in Safe Mode may be one of these applications. Try starting Firefox from another shortcut, for example the one under All Programs.
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