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We hacked the first version when we still didn't know much about JS, but it immediately exploded (500k daily users). Donations were super helpful at that time, being 22 years old with a newborn.
After a couple of years (iirc) Nils Maier joined the team and helped us a lot. Years later he managed to transition the codebase to the new web extension tooling that was introduced by Firefox a few years ago.
This little extension really shaped my professional career. The realization that something I made could have such an impact is what gave me the drive to keep creating small indie products, which I'm still doing nowadays with http://www.datocms.com
Thanks for making my day! :)
Pricing is an integral part of your product! I started selling my product for $5/month, now the lower price is $199/month. I know it's hard to think you can earn them, but you have to try... at worst you can retrace your steps!
Also, a customer might find your product interesting if it costs 50 cents, but not if I they have to spend $10. Would you be willing to build it and maintain it for 50 cents?
Don't postpone a very important part of the equation, and good luck!