It's extremely simple to use: once installed, single-clicking any link within a Web page that points to a PDF, Word document (both .doc and .docx), Excel spreadsheet (.xls and .xlsx), or PowerPoint presentation (.ppt and .pptx) will open them in the Google Docs viewer. With gPDF clicking rich-text files (.rtf), comma-separated value spreadsheets (.csv) or OpenOffice.org files will open them in Zoho Viewer.
Viewing office files in Firefox can be a single-click operation with gPDF. Viewing office files in Firefox can be a single-click operation with gPDF.In both cases you don't need to have a Google Docs or Zoho Office account, or be logged into them.
Thanks to gPDF, for most office documents there's no longer any need to download and view them in the relevant program, which can take a lot of time.
You can still download files manually by right-clicking them and selecting Save As, although in both Google Docs and Zoho Viewer you can select to save-out the file after viewing using the menu options.
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