You could’ve ignored 3D View feature aka Tilt in Mozilla browser, which is introduced with Firefox 11, though this feature is intended for developers to view their pages in 3-dimensional mode; when you enter this mode, it allows you to analyze the structure and page elements in different angles.
Firefox 3D View: View webpages in 3-dimensional mode
By not knowing the purpose novice users can play with this, but 3D View is very helpful for developers in finding layout problems and stray content on their pages. Developer can use this built-in standalone tool in Firefox to optimize layout by looking at the page structure.
1. To open 3D view mode when Firefox is open, press Ctrl+Shift+J to open Web Developer Tools and click on ’3D View’ button that is after the Paint brush (check the screenshot above).
Or Right click on the page and select ‘Inspect element’ to open the page inspector and then click on the 3D View button (can’t see this button?May be your graphics card driver needs an update).
2. To exit this mode, click on the same button again.
