Hello !
I’ve worked on a similar project for a few months now - if you’re interested, you can see some of my work at https://github.com/xx-k/twitchnotifier_src (compiled versions here). For even more shameless self promotion, here’s a website for my project. Check it out - it’s was developed as a replacement for the endless stream of emails notifying me when a streamer went online. Since I’m not a Chrome user either, BetterTTV wasn’t exactly what I was looking for either.
Let me know if you have any questions.