Estoy desarrollando una página web usando JavaScript y HTML, todo funcionaba bien cuando recibí esta lista de errores de mi página HTML:

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).

Estos errores aparecieron después de una actualización automática del navegador (Mozilla Firefox), puede ser que algo haya cambiado en la configuración. ¿Conoces alguna forma de resolver este problema?