Behavior: On Australis, fullscreen mode leaves the tabs and navbar at the top of the screen. Expected behavior: fullscreen shows the webpage fullscreen, without the tabs and navbar.

This isn't a regression caused by Australis.

Why not, and what is the real rootcause of this problem?

There can be a few causes for this: If the focus is currently in a plugin (e.g. adobe flash), the bar at the top may remain. On windows, I also encountered this issue with a custom explorerframe.dll (windows-theme related), though, since youre on OSX, i doubt thats it. And thats the only two I encountered over the years... Please test this again with a clean profile with plugins+extensions disabled. Might as well be some incompatible extension or something...

I think this is up for debate. For example, if you look at OS X, apps like Safari do show a toolbar/locationbar when the *native* full screen mode is used. We used to have a Kiosk mode though, which would not do that. I'm pretty sure there are a bunch of people depending on that for cases where Firefox is used in info-displays. Maybe we can bring Kiosk mode back instead of changing the current behaviour?

(In reply to Stefan Arentz [:st3fan] from comment #4) > I think this is up for debate. For example, if you look at OS X, apps like > Safari do show a toolbar/locationbar when the *native* full screen mode is > used. > > We used to have a Kiosk mode though, which would not do that. I'm pretty > sure there are a bunch of people depending on that for cases where Firefox > is used in info-displays. > > Maybe we can bring Kiosk mode back instead of changing the current behaviour? not quite correct: There should be no bar for any configuration, OS or version, when webgl or html5 video assumes fullscreen. No tool/locationbar should appear in that mode nor the black line it occupies.

(In reply to David H. from comment #5) > not quite correct: There should be no bar for any configuration, OS or > version, when webgl or html5 video > assumes fullscreen. No tool/locationbar should appear in that mode nor the > black line it occupies. Well, that is the part that is up for debate I think. To me it seems logical to follow platform conventions. I do not know about Windows, but OS X browsers certainly interpret it as 'work full screen' and 'display just the content full screen'. Also, HTML5 now has a full screen API, that allows web pages to take over the whole screen. This is exactly for those situations where you want to show video or webgl 'fully' full screen. Example at http://blogs.sitepointstatic.com/examples/tech/full-screen/index.html I think an additional kiosk-mode would still be useful though because that allows you to do that for any site, not just those that happen to use the full screen API.

oopsie: ... interpret it as 'work full screen' and *NOT* 'display just the content full screen'.

It looks like the 'Toolbar Autohide' addon gives me most of what I want. I do wish we would allow for this behavior, since this was the default full screen behavior before Australis landed. https://addons.mozilla.org/en-US/firefox/addon/fullscreen-toolbar-hover/?src=search

Toolbars are being displayed despite Hide Toolbars option is checked in the corresponding contextual menu.

(In reply to Stefan Arentz [:st3fan] from comment #4) > I think this is up for debate. For example, if you look at OS X, apps like > Safari do show a toolbar/locationbar when the *native* full screen mode is > used. > > We used to have a Kiosk mode though, which would not do that. I'm pretty > sure there are a bunch of people depending on that for cases where Firefox > is used in info-displays. > > Maybe we can bring Kiosk mode back instead of changing the current behaviour? Safari shows toolbar because the 'Always Show Toolbar in Full Screen' option is selected in the View menu. When deselected, no toolbar is displayed. So, the user has the choice, while Firefox user cannot hide toolbars at all, despite the corresponding option is chosen.