Hi all, DXR has caught up and is now at 2017-8-27. According to Erik it's affected at times by https://bugzilla.mozilla.org/show_bug.cgi?id=1315983. Searchfox is also indexing C-C correctly. You can use both to check that use of nsIAtom in C-C has been greatly reduced and will be gone completely once the index refreshes next time. This is part of addressing technical debt, reducing XPCOM dependency (by 0.0001%) and avoiding future bustage since atoms are facing changes in M-C. \o/ The last usage removed was also quite hilarious: Component A converted a string into an atom, passed the atom to component B which in turn converted it back to a string. Other variations removed were: Component A converted a string into an atom, passed the atom to component B which in turn did the same lookup on the string just to compare the atoms. Thanks to Aceman for baring with me during a few assassination attempts. And thanks to Nicholas for getting the ball rolling. Finally thanks to Kent, who placed atom use onto the shooting/hit list long ago. Jörg.