Drive-by comment as I haven't looked at webview component we use to show FxA: WKWebView has a delegate callback `webview:createWebViewWith` that gets triggered on _blank targets, so opening a new tab to show the content shouldn't be an issue. I think this function can be used to open in-line (actually I thought _blank was opened in-line if not handled specially). The in-line case seems most like what a user would want, so we should have the navigation bar back title change from '< Settings' to '< Back'
I just clicked 'Terms of Service' and it opened in-line, but pressing the back nav for 'Settings' will bring you back to top-level settings list view.
You need to log in before you can comment on or make changes to this bug.