Niner since 2005
This comparison isn't exactly fair. IE9 is pre-release where as Firefox and Chrome are not. The correct comparision would include IE8.
First you should download the samples and build the sample solution (Sedo.MSBuild.TwitterLogger.sln). When you build it dll
Sedo.MSBuild.Loggers.dll should be created. Then here is a sample command to attach the logger to the build for your project.
msbuild WindowsFormsApplication1.csproj /l:TwitterLogger,C:\temp\Sedo.MSBuild.TwitterLogger\Sedo.MSBuild.TwitterLogger\bin\Debug\Sedo.MSBuild.Loggers.dll;Username=YOUR_USER_NAME;Password=YOUR_PASSWORD
Note these things about that command
Sayed Ibrahim Hashimi