This Cherimoya updated advanced extension can extract and save subtitle from hotstar website !
Important - make sure to switch on the caption in player in order to make button active. Orelse subtitle will not download.
Remember, not all dramas or movies in hotstar website has subs. Those dramas or movies where subs are not available on website, this button won't show up.
This extension extracts the srt file from hotstar website and saves it to local disk. The name of the srt file is automatically extracted. It can only extract srt from hotstar website because its designed to do so.