I think that the content browser should be shown above the other windows, right?
I don’t think so when it’s still as the drawer. You can open a separate Content Browser window by clicking the Content button near the top left of the window and clicking Content Browser 1. This would give you a separate window which would be above the other windows when focused.
I just wanted to open the actor I had created and I think it would be faster
Press control + Space
Doble Click actor to open
(The content is close automatic)
What do you suggest 
Move the mouse to button content
Click the button
Move the mouse to control browser button
Click the button
Move the raton wherewer the windos was the las time
Doble Click actor to open
Click in the button that close the browser when you wanna to see the viewport
Ha, I guess I understand your use case and why it can be frustrating for the several clicks. With how windows work, I’m guessing it’s not possible to show the drawer over detached windows without a major refactor of the drawer since it’s actually part of the main window. It would have to be a separate window always, which would end up being super annoying for other reasons.
Long story short, I guess it comes down to “it’s likely impossible to get the use case you want while still keeping it as a quick drawer, with how windows in OS’s typically work”.
However, the Content Drawer is available in both the main window and other windows (you can see it at the bottom of your Blueprint window), so I guess just use Ctrl+Space in that window instead in this particular use case