I second all the suggestions except the currently reading/online one: in my experience, seeing "currently reading" statistics just makes dead places feel more dead. It's also not a useful statistic: it doesn't tell you how good a post is, or provide any information about the poster, or even show how popular it is (because you can't really extrapolate about the average engagement from only one datapoint). You can't do anything with the number.
I've been doing similar; been using Firefox, but Chrome is installed for its browser-wide automatic captioning. Not something I need often, but I rely on it for the occasional remote meeting here and there. I'm sure free automatic captioning applications exist for my operating system, but I'd have to actually test each one to see if they actually work, and it's just been so convenient keeping Google's around.
(Speaking of which, if anybody happens to have recommendations for free automatic captioning software that works on Ubuntu, I seem to be in the market...)