There aren't as many German-language newspapers available online as I would like. Those that have been digitized are either not in the correct time period or don't have text-searching capability. It's quite disappointing, particularly in comparison with sites such as Trove and Gallica. Pull your socks up, German libraries!
Here are some newspapers it would be helpful to access--German-language papers published in the Free City. Many of them are quite short-lived, as you can see.
Free City newspapers