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Error 408: Encoding with UTF-16.

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Install Firefox addon for unicode support.

"Duckduckgo.com Firefox prevented this site from asking you to install software on you computer."

Install Firefox addon for unicode support. "Duckduckgo.com Firefox prevented this site from asking you to install software on you computer."
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Chosen Solution

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The problem was Google Translate with Right Click. Mozilla had disabled the add-on.

Thanks for your help.