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turn on 128-bit high encryption

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How do I turn on 128-bit high encryption?

How do I turn on 128-bit high encryption?

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It's on automatically by default - Firefox matches whatever level of encryption that a web site uses.

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Firefox supports 256-bit encryption if website provides support for such.

What site are you having trouble with?

It may be looking for the U that used to be in the Firefox 3. 6 and earlier usersagents and if this is the case that is not the best way.