I experienced problems when installed on this computer when the installation is finished, and Firefox is restarted, Greasemonkey menu is available, but when it will add a new script does not happen any reaction when clicking the [Insatll]. Trying to see the Error Console (Tools - Error Console), there are messages like this
Fortunately, these problems are addressed in the new Greasespot few days into the new home for Greasemonkey. Solution:
Create a new directory "gm_scripts" in the Firefox profile folder (Documents and Settings \ [User Windows] \ Application Data \ Mozilla \ Firefox \ Profiles \ kodeprofil.default)
In the gm_scripts new folder created, create a blank file and name the config.xml.
After that, Greasemonkey can install a new script.
To get scripts that can be used, please visit userscripts.org which provides thousands of scripts for various purposes. If you want to know more about Greasemonkey like making their own scripts, diveintogreasemonkey.org Greasespot recommend.