GlimmerBlocker is no longer maintained and should no longer be used as web sites have migrated from using plain http to using https (i.e. encrypted) which prohibits modification by a proxy unless you resort to install custom SSL certiticates on the client.
You should use a browser extension instead.
It was made as a hobby project during 2007-2008 by Peter Speck. It features both a custom http server and http client and a Mac OS X control panel.
Compiling and installing GlimmerBlocker from source requires the latest version of IntelliJ IDEA, Xcode and a decent knowledge of shell scripting. The build process is not simple.
Send patches to: [firstname.lastname@example.org]
Never been tested, so this should be taken as hints, not a cookbook. Mastering shell and perl scripts is mandatory.