Generally speaking, it is not recommended to downgrade the firmware. If you downgrade the firmware, you may come across some bugs or even lose some data since there is something different with the new firmware. If you come across some bugs or you are not satisfied with some new features in the latest firmware, you are suggested to submit them on Feedback via "Settings/ Feedback/+".
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http://bbs.onyx-international.com/ doesn't load any page and the browser complains because it might be non-secure.
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