Control FireFox Window Display Features
There are many problems with certain web sites that alter your web browser controls such as the address bar or control buttons for the sake of deception or design. Sometimes when visiting a web page it will hide the address bar in FireFox so the actual web site address is not visible. This is a security risk because it is now more difficult to tell which web site is being visited. Some web sites change the browser so that it cannot be resized making some information impossible to see. These problems and many more FireFox display control features can all be easily fixed with the two following steps:
1) In the address bar of FireFox type in “about:config” (without the quotes) and press ENTER.
2) Scroll down the alphabetically sorted list to the section where it says “dom.disable_window_open_feature.” for the series of variables below. By double clicking on the Preference Name it will change the value to it’s opposite value, true or false.
Preference Name : Description
close : Prevents the close button from being disabled.
directories : Prevents the bookmarks toolbar from being hidden.
location : Prevents the address bar from being hidden
menubar : Prevents the menubar from being hidden.
minimizable : Prevents popup window minimization from being disabled.
personalbar : Prevents the bookmarks toolbar from being hidden.
resizable : Prevents popup window resizing from being disabled.
scrollbars : Prevents the scrollbars on a popup from being disabled.
status : Prevents the status bar from being hidden.
titlebar : Prevents the title bar from being hidden.
toolbar : Prevents the navigation toolbar from being hidden.
By setting these all to true it gives you the most control over your browser. For the preferences to be updated all instances of FireFox needs to be completed closed and then restarted. (Reference)