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About this Add-on
Some of the formats supported are Microsoft Word (.DOC and .DOCX), Microsoft Excel (.XLS and .XLSX), Microsoft PowerPoint (.PPT and .PPTX), OpenDocument Format (.ODT and .ODS), Adobe Portable Document Format (.PDF), Apple Pages (.PAGES), Adobe Illustrator (.AI), Adobe Photoshop (.PSD), Tagged Image File Format (.TIFF), Autodesk AutoCad (.DXF), Scalable Vector Graphics (.SVG), PostScript (.EPS, .PS), TrueType (.TTF), XML Paper Specification (.XPS), Archive file types (.ZIP and .RAR) (According to wikipedia)
For webpages, there source codes are shown
It allows you to easily view files, without the trouble of downloading them first or to have required software to read the files.