the last thread i found about this topic is a fews years old. i want to see if there is any update.
currently i found 2 extensions in chrome store:
i tried them both but there seems to be a catch, namely that you have to open ogs in a background tab for them to work, ie, you won’t get any notice if ogs is not opened.
i don’t know how things were done back in the days when these extensions were written, but as of now, the ogs tab already has a number that shows how many games are waiting, so if you have to have it opened for the notifier to work then it is quite pointless.
Or did i miss something and the extension is supposed to work without ogs in the background?