User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1) Gecko/20090624 Firefox/3.5 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.1) Gecko/20090624 Firefox/3.5 With the new labtec laser mouse and the labtec driver you are unable to scroll in FF. Uninstalling this driver and use the MS original driver makes the problem go away. With the MS original mouse driver you are not able to program the buttons so now they are Win default. Reproducible: Always Actual Results: removing the Labtec mouse driver cures the problem. Expected Results: A fully working mouse Mouse works fine in all other programs with the Labtec driver. It is only the FF where it doesn't work.
Please report this to the mouse driver developers. This can not be Firefox fault if the MS driver works and it doesn't matter if you get this only with Firefox.