536644 - Disable clearing "Browsing & Download History" when parental controls are enabled

Status: NEW

(Firefox :: Private Browsing, defect)

Description

[Dave Garrett]

Spun off of bug 471658.

When parental control logging (bug 372905) is implemented, features which conflict with that should be disabled when it's on. (bug 471658 comment 14) On demand history clearing, specifically via the Clear Recent History dialog "Browsing & Download History" checkbox should unavailable in that instance.

There are two reasons for this:
1) Don't give users a false sense of privacy. If the activity record isn't really possible to be wiped because the OS is logging it, then Firefox shouldn't be saying it can do so fully.
2) The admin made the decision to monitor the history of this computer and Firefox should act in line with that.

In addition, if Private Browsing mode is to be disabled when logging is enabled (bug 471658) then necessarily other methods to cover your tracks need to be disabled as well, otherwise you're only disabling one way of doing something but not the others.

Implementation-wise, I don't know if it'd be best to disable the entry in the list (grey it out) or to hide it altogether. Users may be confused as to where it went in the later instance, so I think maybe the former with an added tooltip noting the reason might be good.