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How do I turn off X Frame options?

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i have web sites that i can not open now ..i never turned this on..how can i turn it off ?

i have web sites that i can not open now ..i never turned this on..how can i turn it off ?

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Hi yh70rose, your question posted under iOS -- the version of Firefox for iPhone and iPad. However, your Firefox said it's running on Windows 10. Should a moderator move your question to the regular Firefox forum instead of iOS?