We at Microblink love Yammer. Internally, we’re using it as our primary microblogging solution. We love that you can “Yam” from your iPhone, desktop, or from the web interface – but we love even more that more apps are being built for the platform. A recent entrant into this group is YammerFox, an addon for Firefox.

YammerFox adds a small Yammer logo in the lower right corner of your Firefox browser (think of it as Firefox’s system tray). When new messages arrive, you’ll be notified with a small window with the message as well as an audio snippet that just cracks me the hell up (YAM!). Clicking the icon will display a list of the last twenty messages and give you the option to reply or post new messages.

You can set the interval for getting updates, how long popups display, and a few notification options. The addon handles authentication by asking Firefox if you’re logged in. Once you log in, your feed will start coming in and the rest is pretty much automatic. If you don’t have the option of installing the desktop client, you should consider using the addon.