Hmmmm...

18th February 2003 · Last updated: 5th October 2016
 

Mozilla 1.3 Beta offers a familiar trick to IE6 users:

"Image auto sizing allows a user to toggle between full-sized images and images sized to fit the browser window. To give it a try, load a large image into the browser window or size the window to be much smaller. Now clicking on the image will alternate between auto-sized and full-sized. The feature can be disabled (or enabled) from the Appearance panel in Preferences."