SafariSingleWindow is a SIMBL plugin that ensures links that would typically open in new windows in Safari now opens in new tabs instead.
If you decide you no longer want the plugin, uninstalling it is easy. All you need to do is delete the bundle file from the SIMBL Plugins folder, and you're done. The requirements for this plugin are simple - you'll need SIMBL and Safari, and you're good to go.
It's important to note that SafariSingleWindow is licensed and distributed under the BSD License, so make sure you comply with the terms of that license. Overall, if you're looking for a way to make your browsing experience more streamlined and efficient, SafariSingleWindow is definitely worth trying out.