Yesterday a new version of MemChaser has been released. It was necessary due to the implementation of the new Garbage Collector API, which has been landed on Thursday for Firefox 14. Beside the new observers which report about CC/GC activity some of the console message keys have also been changed. That broke our parsing of values and MemChaser was not able to report any GC information.
Version 0.2.1 is a bug fix release and only contains the above mentioned fix. If you are interested in more information check our issue tracker.
There is a lot of work currently happening on version 0.3 which will also get support for the new GC API and will report way more information to the log file. Expect this version by end of March.
If you are interested in helping out with development or testing contact us via our usual channels.