Hi,

The people who answer questions here, for the most part, are other users volunteering their time (like me), not Mozilla employees or developers. If you want to leave feedback for developers, you can go to the Firefox Help menu and select Share ideas and feedback…. Alternatively, you can 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.

That would be interesting. Since that feature has never been implemented on desktop Firefox (Windows, Mac, Linux), even though there is a lot more screen real estate and development history, I suspect it's not likely to come to Android first. Unless there is a good reason that it would be especially valuable on mobile.

In case you decide to post on the Mozilla Connect product suggestion site (mentioned by Paul), use the "Ideas" section of the site (at https://connect.mozilla.org/t5/ideas/idb-p/ideas).