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I am using firefox 3.0 in rhel6.2.Wwhen I press F11, the fullscreen mode appears, but if the mouse pointer goes to the top of the screen at fulscreen mode then the task bar appears. I want to avoid the appearance of this bar. I have searched the net but got the answers how to show them in full screen. Please suggest me the settings I need to do.

uddipana
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2 Answers2

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Go to ~/.mozilla/firefox/<profile folder>/chrome/ (check in profiles.ini which profile you are using), and put this piece of code in userChrome.css (create one if it doesn't exist) 

/* only needed once */
@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul");

#fullscr-toggler { display:none!important; }

Source: https://support.mozilla.org/en-US/questions/942904

Phu Ngo
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  • I'm running Firefox `106.0.3`; I added this, but it didn't work. I know `userChrome.css` is being found, and is being applied (because other settings in `userChrome.css` take effect). Despite this, the address bar *still* pops up whenever I move the mouse to the top of the screen. This is infuriating and makes it Jupyter lab near impossible to use in full screen mode. Can I confirm that this is *supposed* to prevent the address bar from appearing when the mouse is moved to the top of the screen in full-screen mode? – MRule Nov 01 '22 at 11:10
  • @MRule try this instead: ``` #navigator-toolbox[inFullscreen="true"] { margin-top: -99px !important; } ``` – Phu Ngo Nov 01 '22 at 15:21
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Open Firefox and type about:config in the addressbar and press Enter. It'll confirm, click on I'll be careful, I promise! button.

Now type autohide in the Filter box and look for following boolean key:

browser.fullscreen.autohide

The entry "browser.fullscreen.autohide" would be set to true. Double-click on it and change its value to false.

Ankur Tiwari
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    I believe OP wants the task bar to not appear, and not to always appear. – Phu Ngo Mar 07 '16 at 05:00
  • @Ankur Tiwari, Thank you for ur help but this is making the task bar appear always in fullscreen mode, but I wanted the opposite of this. Well its solved now – uddipana Mar 07 '16 at 08:58