Firefox 新建标签页，不是在当前标签页右侧，跑到所有标签页的右侧，怎么回事？历史记录管理器里，点开一个网址，然后右侧的滚动条一下子跑到最上面，这是怎么回事？
When I open a new tab in Firefox, it is not on the right side of the current tab, but on the right side of all tabs. What's going on? In the history manager, I click on...
