I've noticed that since the last update the behavior of my middle mouse button has changed (both in firefox and in chrome). I use my middle mouse button to pan in a sketchfab model. This has always worked just fine. When I use the middle mouse button now, I pan the webpage (not the 3D model) which most of the time means I'm scrolling the 3D model out of view. This also happens when I make the model fullscreen. I'm not sure what exactly happens, but I'm not panning the model.
When I open the editor for one of my own models, panning with the middle mouse button works as before.
Can this be fixed?