Right now our various platform native implementations of nsIFilePicker only support selecting a single directory when using nsIFilePicker::modeGetFolder. Some OS native pickers support selecting multiple directories though, and the API that we've been working on for bug 1164310 supports selecting more than one directory.
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: 15 minutes ago
Resolution: --- → INACTIVE
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