Advanced Options > Core > Enable global frame names

Keep the following in mind:
* You have to reload your Interface to enable the global frame names.
* Frames are mostly generated dynamically (and in the future all will be), this means that the frames may not yet be available when your interface has just loaded.
* As a rule all (dynamic aka 'newer') frames are named FX_ followed by the short name for the module, and then followed by clone number. List of some examples:
FX_Timer (=main instance), FX_Timer1 (=first actual clone), FX_Timer2 (=second actual clone), ...
FX_Cooldown (=main instance), FX_Cooldown1 (=first actual clone), ...
FX_Splash (=main instance), ...

Currently all other modules still use the old global name.

* Note: currently there's no global names available for the spell timer groups or bars, but these can be accessed in the indexed table 'groups' for every frame. Bars can be accessed from indexed table 'bars' in every group.