Even if 10% of employees like their jobs, that's still a market of 10 million people. If somehow this extension could reach them all and bring 1 cent a month per user to it's creator, that's still 1M$ a year for what's probably a week-end project. Not too bad.
And if it end up reaching 1% of this market that's still 10k$ a year.
And if it end up reaching 1% of this market that's still 10k$ a year.
So, hey, good job doing this !