Adds translucent bars to the top and bottom of the viewport, which indicates the previous viewport position when the page is scrolled. This tool will prevents you from getting lost when you press the Page Up/Down keys.
目前為 2017-07-13 提交的版本，檢視 最新版本。
這裡只顯示彼此間有代碼差異的版本。 顯示所有版本。
