Nope, that doesn't work yet — and is what I'd consider a true offline mode. Right now if you go offline while using Figma you should be able to do work but the file won't be saving. When you reconnect, we attempt to save the file. However, just because it should work this way doesn't mean it's something we've spent a lot of time supporting, so I don't recommend it because it's possible to lose work.
Nope, that doesn't work yet — and is what I'd consider a true offline mode. Right now if you go offline while using Figma you should be able to do work but the file won't be saving. When you reconnect, we attempt to save the file. However, just because it should work this way doesn't mean it's something we've spent a lot of time supporting, so I don't recommend it because it's possible to lose work.