Selecting a region in a file in browse mode could allow navigation to the next commit changing the selected lines
When looking for a change that has affected functionality in a subset of a file, a method to go to the next commit changing the interesting lines would be nice. Basic UI could be to select a set of lines, and then either the commit list is changed to only show the relevant commits, or a context/right click menu could be used to navigate to next/previous change. Even just highlighting the changes in the commit list could be useful