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how to turn off auto full screen

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New FF turn into full screen [F11] by default How can I turn this annoying thing off?

New FF turn into full screen [F11] by default How can I turn this annoying thing off?

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hello, can you try to replicate this behaviour when you launch firefox in safe mode once? if not, maybe an addon is interfering here...

Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

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If you close Firefox while not in full screen mode then Firefox should store this choice as persistent data in the localstore.rdf file.

You can check for problems caused by a corrupted localstore.rdf file.