Hello Jason,

Maybe you'd like to give this add-on a try :

https://addons.mozilla.org/en-US/firefox/addon/fullscreen_plus/

I tried it, but no luck. I've updated my review from two years ago (https://addons.mozilla.org/en-US/firefox/addon/fullscreen_plus/reviews/972909/) to indicate that Ctrl+Shift+F has no effect with the plugin installed.

See if maybe the Chosen Solution here will work for you (or another suggestion) :

https://support.mozilla.org/en-US/questions/1254683?mobile=0

Still no luck. The Chosen Solution on that link leads to another question where the Chosen Solution is the add-on you suggested earlier.

I tried creating a clean profile, but the behavior is the same there.

I tried setting full-screen-api.allow-trusted-requests-only to false, but that had no effect (on standard full screen or ability to invoke full screen with ctrl+shift+f with the fullscreen-plus addon).

See also:

• Bug 1403085 - Use native fullscreen on macOS (behind full-screen-api.macos-native-full-screen pref)

(please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

Asking you to see if that Chosen Solution would work for you wasn't one of my brightest moments (my apologies).

See this really old bug report :

https://bugzilla.mozilla.org/show_bug.cgi?id=774677

And then this one :

https://bugzilla.mozilla.org/show_bug.cgi?id=740148

If you want to, you could vote to show your interest for that bug report :

https://bugzilla.mozilla.org/page.cgi?id=voting.html

If you have any additional information to add, you can post a comment, but keep it to the point and concise. If you have no additional information but have the same problem : posting "I have the exact same problem" would suffice (and maybe post a link to your thread).

See the section Commenting, especially #4

There is a userChrome.css script that will remove the toolbar from full screen mode for Firefox on macOS.

1. Go to Help > Troubleshooting Information, then click on Show in Finder. That will open Finder in your Firefox profile.
2. Quit Firefox.
3. Create a folder in your profile folder called chrome
4. Open a text editor, like TextEdit (in Plain Text mode!), and paste the following code:

   #navigator-toolbox[inFullscreen] {
       position: relative;
       z-index: 1;
       height: 3px;
       margin-bottom: -3px;
       opacity: 0;
       overflow: hidden;
   }
   
   #navigator-toolbox[inFullscreen]:hover {
       height: auto;
       margin-bottom: 0px;
       opacity: 1;
       overflow: show;
   }
   
   #content-deck[inFullscreen]{
       position:relative;
       z-index: 0;
   }
   

5. Save the file in the chrome folder, and name it userChrome.css

If you ever want to revert that behaviour, just get rid of the code from the file.

See also:

• https://apple.stackexchange.com/questions/174042/true-full-screen-in-firefox

Thanks for all the tips. I ended up grabbing the CSS linked from the open ticket (https://bugzilla.mozilla.org/show_bug.cgi?id=740148#c93) (thanks McCoy) and using the advice from Chris Ilias, linked that content to the chrome/userChrome.css file in my profile. Now in fullscreen the bars tuck away and resume nicely. That's what I need to run my presentation next week. Thanks to everybody for the help.

That is about this code in case that pastebin web page will disappear:

:root[inFullscreen] #navigator-toolbox {
	z-index: 1;
	margin-top: calc(-40px - var(--tab-min-height));
}
:root[inFullscreen] #navigator-toolbox::after {
	visibility: hidden;
}
:root[sizemode="fullscreen"][inFullscreen] #navigator-toolbox,
:root[sizemode="fullscreen"][inFullscreen] #navigator-toolbox::after {
	transition: all .2s ease .5s !important;
}
:root[inFullscreen] #navigator-toolbox:focus-within,
:root[inFullscreen] #navigator-toolbox:hover {
	transition-delay: 0s !important;
	margin-top: 0;
}
:root[inFullscreen] #navigator-toolbox:focus-within::after,
:root[inFullscreen] #navigator-toolbox:hover::after {
	transition-delay: 0s !important;
	visibility: visible;
}
:root[inFullscreen] #content-deck {
	position: fixed;
	z-index: 0;
	top: 0;
	width: 100%;
	height: 100%;
}
:root[inFullscreen] #content-deck > #browser {
	width: 100%;
	height: 100%;
}

I tried the code on Linux and added some important flags and adjusted the margin-top (I have the Bookmarks Toolbar visible) and have the navigator-toolbox sliding in. You probably will have to adjust the 'margin-top: calc()' value to make the toolbar fully hide and still be able to make it slide down.

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

:root[inFullscreen] {
  --navbar-height: 40px;
  --personaltoolbar-height: 26px;
}

:root[inFullscreen] #nav-bar {
  height: var(--navbar-height) !important;
  min-height: var(---navbar-height) !important;
  visibility: visible !important;
}

:root[inFullscreen] #PersonalToolbar {
  height: var(--personaltoolbar-height) !important;
  min-height: var(--personaltoolbar-height) !important;
  max-height: none !important;
  visibility: visible !important;
}

:root[inFullscreen] #navigator-toolbox {
  margin-top: calc(0px - var(--navbar-height) - var(--personaltoolbar-height) - var(--tab-min-height)) !important;
  z-index: 1;
}

:root[inFullscreen] #navigator-toolbox::after {
	visibility: hidden !important;
}
:root[sizemode="fullscreen"][inFullscreen] #navigator-toolbox,
:root[sizemode="fullscreen"][inFullscreen] #navigator-toolbox::after {
	transition: all .2s ease .5s !important;
}
:root[inFullscreen] #navigator-toolbox:focus-within,
:root[inFullscreen] #navigator-toolbox:hover {
	transition-delay: 0s !important;
	margin-top: 0 !important;
}
:root[inFullscreen] #navigator-toolbox:focus-within::after,
:root[inFullscreen] #navigator-toolbox:hover::after {
	transition-delay: 0s !important;
	visibility: visible !important;
}
:root[inFullscreen] #content-deck {
        display: block !important;
	position: fixed !important;
	z-index: 0 !important;
	top: 0 !important;
	width: 100% !important;
	height: 100% !important;
}
:root[inFullscreen] #content-deck > #browser {
	width: 100% !important;
	height: 100% !important;
}

This is ridiculously complicated, and and I never had this problem till tonight! In Safari, you just hit View, and click on "hide toolbars when in full screen", not all this stuff that no one would know! What is FF thinking?

Hi StevenCee, This thread was marked as the solution by the person who asked the original question (Jason R. Coombs). Your issue may have similar symptoms, but it is likely a different cause/solution, especially if it just started yesterday. Could you please post your question using the following link: https://support.mozilla.org/en-US/questions/new That way, volunteers can get more details about your setup.

Because this thread is solved and more people might start using it for their own questions, I'm going to lock it.