shortly vs briefly

shortly and briefly both are adverbs.

Word	Noun	Adjective	Verb	Adverb
shortly	No	No	No	Yes
briefly	No	No	No	Yes

As adverbs, shortly and briefly are synonyms defined as:

Other synonyms of shortly include concisely, in brief, in short.

shortly (adverb)	briefly (adverb)
in the near future	for a short time
for a short time	in a concise manner; in a few words
in a curt, abrupt and discourteous manner
at a short distance
in a concise manner; in a few words