I think nobody sane would trust this.
One does simply not trust a 3rd party (random browser) app.
Congrats on the launch, it's always great to launch something. If it's useful to you, happily use it. But don't expect others to do so.
It's harder to verify this than to figure out the use of the command directly.
In any case, it would be better if you provided placeholders anyway and let the user replace them outside of the browser.