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mdn2
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en-US
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docs
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Mozilla
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Add-ons
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WebExtensions
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API
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i18n
i18n
detectLanguage
getAcceptLanguages
getMessage
getUILanguage
LanguageCode
Locale-Specific_Message_reference
/
detectLanguage
getAcceptLanguages
getMessage
getUILanguage
LanguageCode
Locale-Specific_Message_reference