Ресурс заблокирован из-за несоответствия типов MIME (X-Content-Type-Options: nosniff)

Я разрабатываю веб-страницу, используя JavaScript и HTML, все работало хорошо, когда я получил этот список ошибок от моей HTML-страницы:

The resource from “https://raw.githubusercontent.com/dataarts/dat.gui/master/build/dat.gui.min.js”
  was blocked due to MIME type mismatch (X-Content-Type-Options: nosniff).
The resource from “https://raw.githubusercontent.com/mrdoob/three.js/dev/build/three.js” was
  blocked due to MIME type mismatch (X-Content-Type-Options: nosniff).
The resource from “https://raw.githubusercontent.com/mrdoob/three.js/master/examples/js/renderers/CanvasRenderer.js”
  was blocked due to MIME type mismatch (X-Content-Type-Options: nosniff).
The resource from “https://raw.githubusercontent.com/mrdoob/three.js/master/examples/js/renderers/Projector.js”
  was blocked due to MIME type mismatch (X-Content-Type-Options: nosniff).
The resource from “https://raw.githubusercontent.com/mrdoob/three.js/dev/build/three.js” was
  blocked due to MIME type mismatch (X-Content-Type-Options: nosniff).

Эти ошибки появились после автоматического обновления браузера (Mozilla Firefox), возможно, что-то было изменено в настройке. Знаете ли вы какой-нибудь способ решить эту проблему?

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