How to monetize an extension?

Hi! I've developed recently few extensions for chrome/firefox and found a way to monetize them without being obtrusive to the users...
Does anyone knows or has experience with this as I would want to find the best way for extension monetization?!
Thanks.

Well, what did you come up with?

I have no experience with it myself but I believe there are a couple of interesting products out there like extlabs.io.

I've checked the site you mentioned and I wouldn't go with that kind of monetization, I think thats very annoying to the users. I can share my method with you on skype> itconect
Thanks.

Add some kind of notification and add a PayPal-Button for Donations. Offer Pro Features/additional functions or Support for Money like Linux.

Hi, we are specializing in Extension monetization. It is not easy, and if someone promisses you a 100% garantuee that the monetization would be successful it is either a fraud, or introduce me to the guy )). The browsers normally don't like developers earning money from the stuff they have developed. But I do promise that we would increase the chances of you getting money. If it sounds interesting ping me (s)yevgen.kapinus