This idea has been merged into another idea. To comment or vote on this idea, please visit CF-I-1304 Allow offline mode.
Currently, if you want to play for example a Minecraft modpack while on holiday in a place where there is no internet connection possible, you cannot because the launcher will not launch without internet. A "play offline" option has been badly needed for years. About time this was fixed!!!!
So sad that this isn't planned, first one i seen that isn't going to be added.