I suspect you are referring to the issue discussed in the answer below. https://support.mozilla.org/en-US/questions/1364418#answer-1474290

Blame the developers, not the people reading and posting on this forum.

Hi,

The people who answer questions here, for the most part, are other users volunteering their time (like me), not Mozilla employees or Firefox developers. If you want to leave feedback for Firefox developers, you can go to the Firefox Help menu and select Submit Feedback... or use this link. Your feedback gets collected by a team of people who read it and gather data about the most common issues.

You can also file a bug report or feature request. See File a bug report or feature request for Mozilla products for details.