My sidebar kept disappearing when opening a new window. After asking the internet, I learned that this was part of the latest UI update. This is a horrible update (sorry programming team) because if you always want your sidebar to show up, all that extra stuff has to show up as well. See first image. The second problem is that the Hide Sidebar button is too close to the Back button. I keep clicking on the Hide Sidebar button when I really want the Back button. Is there a way to hide these controls? I know you can move them to the right, but then, so does your sidebar. I don't have a lot of screen real estate. Can we have an option to go back to the "classic" settings for sidebars? By the way... In the previous versions of Firefox, I was able to click on a link (example: Google search) and my sidebar (in my case with my bookmarks) was always there in the new window or tab. Now when I click on a link, the sidebar with my bookmarks disappears in the new window. I have to keep enabling it if I want to see my bookmarks. I'm 100% sure that this is causing frustration with over 87% of Firefox users. Can we please bring back that old functionality?