Created attachment 600775 [details]
- Install and disable the add-on
- about:memory?verbose + Minimize memory usage
-> Compartment or compartments (depending on sameGroupAs availability for sandboxes) still present.
The add-on uses widget, so the leaks are probably a result of the fix for bug 724404 not being present in the SDK 1.5 (see bug 730566 comment 5)
Version 0.4.6 doesn't have any leaking on disable so marking as fixed.