If you're an exclusive Firefox user like me, and also happen to own an IP camera (Foscam or other brand), you may also find IP Cam PTZ 1.2 (by DRZ400S) interesting. It is not yet listed in the Firefox Add-ons browser, but it can be downloaded here.
Once installed, it will add some controls on the Navigation Toolbar, but before using them you'll need to go to the plug-in options to configure your IP camera url and, if needed, customize the cgi commands used for each actions. If your camera is a Foscam, there's nothing to do, but you can for instance, include your login or specify the video resolution (Syntax: videostream.cgi[?user=&pwd=&resolution=] )
If your camera is not compatible with the Foscam command set, you should first obtain a CGI reference document from the manufacturer and adapt the options accordingly.
Clicking the camera icon will open the browser's sidebar and display the video streaming from the camera.
The PTZ commands are present as well as a snapshot button which can be set to auto-refresh every given number of seconds!
By far, the easiest way to access your IP cam while browsing away...
Feel free to post your comments and suggestions on the author's page or here.