Google Docs Viewer 제작자: def00111

If you prefer Microsoft Viewer use this add-on:
https://addons.mozilla.org/firefox/addon/online-docs-viewer/

To view pdf files with the Google Viewer use this add-on:
https://addons.mozilla.org/firefox/addon/google-pdf-viewer

My other add-ons:
https://addons.mozilla.org/firefox/addon/always-preview-webextension
https://addons.mozilla.org/firefox/addon/viewerjs-we
https://addons.mozilla.org/firefox/addon/docs-online-viewer-fork/