When applying a new theme in Firefox in the "Manage Themes" section, it would be great not to be forced back to the top of the screen, so the user can keep scrolling down the list of installed themes to choose another theme if they so wish.
The current behavior scrolls the user back to the top when a theme is selected, which isn't ideal when you want to choose a different installed theme from your list of themes and have to scroll all the way back down to explore the rest of your themes.