+++ This bug was initially created as a clone of Bug #771174 +++ IE10 allows users to control how link invocation works, we should allow the same type of control for when Firefox is the default browser. - The Desktop options UI should present a new drop down box only in Windows 8 for "Choose how to open links". Possible options are: Let Firefox decide, Always in Desktop Firefox, and Always in Metro Firefox. - The UI should display disabled when Firefox is not the default browser in Windows 8. - The UI should not be visible when OS < Windows 8 Since this is not a per Firefox-profile setting, and since the CommandExecuteHandler is the thing to handle this option, we should store this setting in the HKCU registry. As part of this task we should also honor this option in the code for the CommandExecuteHandler.

Yuan/Michael - feel free to rename the summary for this UX design work.

Mass close of bugs in obsolete product https://bugzilla.mozilla.org/show_bug.cgi?id=1350354