Rated 3 out of 5 stars
This is a good start but it would be nice if the browser window returned to its original location once the sidebar is closed again. Right now what happens is the browser window is shifted to the right if there is not enough room for the sidebar on the left. This is fine but then when the sidebar is closed again your window is left in a less-optimal place for reading. Maybe have an option to expand sidebar out from the right side instead.