Open IT Online is a Firefox extension that allows to open and edit documents and images from everywhere. Thanks to this extension, you will be able to open several types of documents directly in Firefox using online services (such as Zoho) without needing any software to be installed. In other words, it adds an option to your Firefox “Open With” dialog to let you open Word documents, spreadsheets, presentations, and more file types in the Zoho suite, Google Docs, ThinkFree Viewer & others. You can configure defaults for every file type – nice and convenient for fans of online editing. Open IT Online is a free download and it works wherever Firefox 2 or 3 does.
Here’s more screenshots & a nice video of how to use Open IT Online to view documents online with Zoho. Install the Open IT Online Firefox add-on to view/edit files directly online without downloading them.