Many of the changes in the newest Firefox for mobile are an improvement, but one thing that really isn't is the location of the share button. I use this feature more than any other. It used to be that I could press and hold to select the tabs I wished to share and the share button would pop right up. Now, the menu contains a bookmark icon (star) and a bin. Meanwhile the share button is hidden under the dot menu, even though there's more than enough room for it in the header bar, even with the star and bin. If there is currently no way to customize the quick-access icons, I encourage developers to consider making the share button more prevalent or allowing users to customize quick access, in future.