Will this be an extension that receives "long term support" or, like so many others, will it become crippled over time after its author moves on to chasing prettier butterflies? This is an extension that is mission critical: once you begin using it, it's a dependency you will find extremely difficult to terminate. While the author seems principled, he's also young; life is unpredictable and young men tend to be quite ambitious while at the same time often lacking in focus or direction. Will those who become utterly dependent upon this extension be able to depend upon its continued viability five or more years from now, on all relevant platforms? I worry now: currently my browser is held back repeating the class of 2015 because the majority of the extensions that I have depended upon are no longer being maintained and are now "incompatible with multiprocess" in Firefox 54. Having a password extension become incompatible in the future from lack of maintenance would be an order of magnitude more intolerable.
Addendum: I thank the author for taking the time to answer my concerns in some detail. Even software being open source is no guarantee of long term success: instead of being a contest for profit, it becomes a contest for popularity that determines which projects maintain interest of developers. Let's hope that this project gains in popularity and maintains it.