Henrik is seeing this too. The log while running the testscript is attached to this bug as well as the patch to the changes made including the addonsAPI that was run when seeing this leak.

will look into this

I see the same on OS X by just running this restart test: http://hg.mozilla.org/qa/mozmill-tests/file/default/firefox/restartTests/testExtensionInstallUninstall How to test this: 1. Install the setuptools via MacPorts 2. Run "sudo easy_install mozmill" 3. Clone the Mozmill test repository: http://hg.mozilla.org/qa/mozmill-tests/ 3. Run Mozmill: mozmill -b /Applications/Namoroka.app -t firefox/restartTests/testExtensionInstallUninstall --show-all

Henrik, do you know if this is still an issue?

I would think so. As we know we leak a lot with Mozmill. You should easily be able to reproduce with the above mentioned steps and a tinderbox debug build: http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-central-macosx/

Mozmill will reach its end of life soon. We are currently working on getting all the tests for Firefox ported to Marionette. For status updates please see bug 1080766.