That would be something you change from Windows and I doubt from FF can do that change.

WestEnd dijo

That would be something you change from Windows and I doubt from FF can do that change.

what I mean is that in firefox you can access the tab for private nagivation by its shortcut ctrl shift p, but in chrome the shortcut was ctrl shift n, as in other browsers.. is there any way of changing firefox shortcut to match the others?

In Firefox the Ctrl + Shift + P is set for New Private Window and Ctrl + Shift + N is set for Undo Close Window.

Since Ctrl + N is for a New Window it makes sense for Undo Close Window to be Ctrl + Shift + N and not Ctrl + Shift + P

https://support.mozilla.org/en-US/kb/keyboard-shortcuts-perform-firefox-tasks-quickly

There are a number of keyboard related extensions for Firefox 57+ such as https://addons.mozilla.org/en-US/firefox/addon/shortkeys/ - Shortkeys (Custom Keyboard Shortcuts) for Firefox