WowAce

What is the enhancement in mind? How should it look and feel?

An option to enable chatbox-warnings when a buff is about to expire.

Please provide any additional information below.

I think that making this option bargroup-based would be sufficient, with an option to set at which time the warning (e.g. "Flask of Endless Rage is about to expire") should show (e.g. 4 minutes till expiry). Then one could simply move all buffs that he needs to track (rogue poisons, flask, well fed, ...) to this bargroup and never start an encounter with a self-buff running out again :)

I know there are special addons to track certain buffs like this, but it would be so much better to have this feature included and to not have to install another addon that eats memory. Thank you for taking this into consideration.