This came out of bug 424019 where the JS engine's JS_Delete*2 APIs end up giving back false information about properties being deleted when they really are deleted, but then re-created immediately on next resolve. Since XPConnect works this way, we should simply make it define such properties as permanent so that we wouldn't need hacky fixes like the one for bug 424019.
Per policy at https://wiki.mozilla.org/Bug_Triage/Projects/Bug_Handling/Bug_Husbandry#Inactive_Bugs. If this bug is not an enhancement request or a bug not present in a supported release of Firefox, then it may be reopened.
Status: NEW → RESOLVED
Last Resolved: 29 days ago
Resolution: --- → INACTIVE
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