The extension is not pumping right now. But, I am happy since the main thing right now is to develop extension further.
How am I honing it? I collect feedback!
I gave the working version, MVP, as one may say to my relatives and friends, to my colleagues. I am awaiting a lot of biased comments on that. I still managed to get at least one helpful tip: I should make an option for 12 or 24 hours for my timer;
I posted the extension on Gumroad, Indie Hackers (duh), and asked for feedback in the Trends Group on Facebook. On FB, I have become one of the best advice to date. I should think about gamifying the extension so that I can increase the utilization of the product. Brilliant! Finding information and implementing gamification is one of the top priorities.
I am reaching users in Subreddits /posture and /pain. I practically ask what they would like to use for their problems. It usually takes time to build enough word of mouth. Here again, it helps to know the field: as a neurologist, I can directly give some advice as a response.