I have firefox size from top to bottom of the screen in linux.When I maximize it an unmaximize it , the size is not the sameany more.I am not using title bar.When using title bar, the firefox window size is remembered and is ok.
Some programs for pdf have an option to change white background and black texts to
black background and white text.
I miss this option in firefox, so I have to use program as pdf viewer in linux