As you may know, Firefox 57 comes with a new user interface, known as "Photon". It is intended to provide a more modern, sleek feel that’s consistent across multiple platforms. It replaced the previous "Australis" UI and features new menus, a new customization pane and tabs without rounded corners. There is a special option you can enable to drag the app window quickly. It is called "Drag Space" and appears as a tiny line above the tab row.
Firefox 57 is a huge step forward for Mozilla. The browser comes with a new user interface, codenamed "Photon", and features a new engine "Quantum". It was a difficult move for developers, because with this release, the browser drops support for XUL-based add-ons completely! All of the classic add-ons are deprecated and incompatible, and only a few have moved to the new WebExtensions API. Some of the legacy add-ons have modern replacements or alternatives. Unfortunately, there are plenty of useful add-ons which have no modern analogs.
The Quantum engine is all about parallel page rendering and processing. It is built with a multi-process architecture for both CSS and HTML processing, which makes it more reliable and faster.
It is possible to make it easier to drag Firefox's main window by enabling the Drag Space feature. Once enabled, it adds a few more pixels above the tabs, so you can click it and drag the window faster. This can be useful when you have plenty of tabs opened with no space next to a tab which you could use to move the window.
Note: the "Drag Space" area becomes invisible when Firefox is maximized. Before enabling it, you need to unmaximize its window.
To enable Drag Space in Firefox 57, do the following.
- Click on the hamburger menu button (the last button on the right in the toolbar).
- The main menu will appear. Click on Customize.
- The Customize mode will be enabled. At the bottom, find and enable the check box Drag Space.
Here is how it looks.
Firefox 57 with Drag Space disabled(default).
Firefox 57 with Drag Space enabled.That's it.