Here are some of the extension types it can recognize and handle:

• Documents (*.doc, *.rtf, *.odt, *.sxw)
• Spreadsheets (*.xls, *.csv, *.ods, *.sxc)
• Presentations (*.ppt, *.pps, *.odp, *.sxi)
• Images (*.jpg, *.gif, *.png)

How do you use it?  Well whenever you face a document with the “Open With” option, it will also give you the option to open it Online.  From there you can choose one of the various Web 2.0 tools to view and edit the document in question.

One last really nice feature is that Open IT Online gives you the ability to also see the file size of the document you are about to view.  This is handy in determining if you want to open the file, or not.

You can pick up the Open IT Online extension from the Firefox Add-ons site or learn more about it at OpenItOnline.com.

All you need to do is download the LOOP for Firefox extension! Yet another good power tool for Firefox.

Upload, convert and combine your files to PDF from a tidy toolbar, without the conversion getting in the way of your Web browsing. LOOP for Firefox allows you to convert and combine files to PDF with the click of a button.

LOOP for Firefox also provides a revolutionary way to document web pages while browsing the Internet. You can seamlessly document URLs with the click of a button and then download or combine the web pages with other files to a single PDF.

+ Download and Install the LOOP for Firefox Extension!