A good news for all those who do not wish to download a converter for converting .docx, .xlsx, .pptx etc. files to .doc, .xls, .ppt respectively. There's a new Firefox extension from Microsoft that will help view all .*x extension files to be displayed as normal html pages in FireFox.Called OpenXML viewer, this plug-in (download link) lets you read docx files inside the Firefox browser just like any other HTML web page while retaining all the text formatting and layout.
There’s a command-line version of OpenXML viewer (download link) available as well for converting docx documents into HTML files that you may then open in any other web browser.
