If you use Mozilla Firefox and also love minimal UI, here is an excellent add-on for you.
"MinUI" is an awesome add-on for Mozilla Firefox which hides all toolbars including addressbar and orange Firefox button as soon as you press "Ctrl" key.

You can bring them back by pressing "Ctrl" key again.
It might become very useful when you want to concentrate on a webpage and don't need any toolbar. In this way, you can get more extra free space to read the webpage content. It also helps when you are writing a comment or post and want more space to write.
You can download it using following link:
This article was posted by VG in following section: Mozilla Firefox.
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Uewd
Thanks for this. It may help at times.
amiel
this is neat. im also using hide tabbar extension which works the same way.
mr. vg i hope you are not annoyed but can you help me with this, take a loot at my DA screenshot:
l1nkysys.deviantart.com/#/d3gufdi
Abhishek
Nice add-on. Firefox looks better in this clean way.
Fritz
Did you forget the "good old" F11 keystroke? This needs no add-on, does not slow down firefox like every add-on and is included in every version, I hope!
amiel
^its for design purposes, like showing off your desktop...
VG Fan
Awesome post thanks VG!
odio
And what happens when u want to zoom in and out a page using ctrl + wheel? its gonna disapear all the time?