If you use Mozilla Firefox and Microsoft Office 2003 or 2007, here is a good news for you.
Microsoft has released Office Web Apps Browser Plugin for Mozilla Firefox users which installs an add-on that enables Office documents to be opened directly from Firefox into the appropriate Office desktop application.
If you have Firefox and either Microsoft Office 2003 or Office 2007, this plugin enables you to open documents directly from Office Web Apps into the appropriate Office desktop application. For example, in Word Web App, clicking Open in Word results in the document being opened in Word 2003 or Word 2007. When the document is saved in Word, it is saved back at the web location where it was opened.
This plugin is unnecessary for people who use Firefox and Microsoft Office 2010 because Office 2010 already includes the add-on for Firefox.
It can be installed in Windows 7, Windows Vista (Service Pack 1 and 2) and Windows XP (Service Pack 3).
You must be using Mozilla Firefox 3.5+ version to be able to install this extension.
You can download it using following link:
Install the add-on in Mozilla Firefox, restart Firefox and then open a document in Office Web Apps. Now you can click the command to open the document in the Office desktop application (Open in Word, Open in Excel, or Open in PowerPoint).