Just a quick notice to anyone who is having trouble with to large or to small icons on the toolbar,in the firefox browser, and there not been a to obvious way to change them. If you go to the address box and type in about:config this will bring you to a warning box, but carry on, as the warning says, please be careful. In the box type layout c.s.s.devpixels.perpx. Right click on it, and you will be able to modify the number from the figure it is now, ,probs -1, and change it to 1.0. If this is still not big enough, go up in 0.1 increments, and that should do the trick. Hope this helps