Will a tree frog die if kept in glass jar

Well it purely depends, yes it could die if you keep it in a glass jar unless you poke holes into the lid and give it some damp soil and possibly a stick to keep it occupied, but a glass jar isn't necessarily a good choice because the space is often small, but you should put the frog in a container that is perfect for its size. Yet don't take it from me, it would be best to consult perfessional websites. 

Uh, if treated properly, with all it needs, then it'll be fine. but only if TREATED PROPERLY