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I am looking for an add-on or a solution for Firefox which enables transparency on the whole Firefox window.

It would be best if the degree of transparency could be adjusted and there were hot keys to quickly enable or disable the add-on.

Any idea?

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Yes. Make the whole window transparent. –  lamwaiman1988 Sep 15 '11 at 15:12
    
I made that more general. You probably won't get far with a Firefox add-on, this will need some Windows tweaks. I assume Windows is correct? –  slhck Sep 15 '11 at 15:14
    
Yeah. Thanks for the edit. –  lamwaiman1988 Sep 15 '11 at 15:36

2 Answers 2

up vote 2 down vote accepted

PowerMenu: http://www.abstractpath.com/powermenu/ would do what you would like.

Here are some alternatives as well: http://alternativeto.net/software/powermenu/

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PowerMenu contains a trojan - what a safe free stuff! virustotal.com/file-scan/… –  Nam G VU Oct 7 '11 at 7:00
    
1 of 41 scanners sounds like a false positive to me. –  Howard Oct 7 '11 at 13:34

The accepted PowerMenu application didn't work for me. However, How-To Geek has the great solution via AutoHotkey. Just install AutoHotkey and save this script as a .ahk and execute it. You can then control the transparency of any Windows by holding the Win/Meta key and scrolling the mouse wheel. This is of course, adjustable by editing the script. This worked on every window I tried under Windows 7 x64.

; changing window transparencies
#WheelUp::  ; Increments transparency up by 3.375% (with wrap-around)
    DetectHiddenWindows, on
   WinGet, curtrans, Transparent, A
    if ! curtrans
        curtrans = 255
    newtrans := curtrans + 8
    if newtrans > 0
    {
        WinSet, Transparent, %newtrans%, A
    }
    else
    {
        WinSet, Transparent, OFF, A
        WinSet, Transparent, 255, A
    }
return

#WheelDown::  ; Increments transparency down by 3.375% (with wrap-around)
    DetectHiddenWindows, on
    WinGet, curtrans, Transparent, A
    if ! curtrans
        curtrans = 255
    newtrans := curtrans - 8
    if newtrans > 0
    {
        WinSet, Transparent, %newtrans%, A
    }
    ;else
    ;{
    ;    WinSet, Transparent, 255, A
    ;    WinSet, Transparent, OFF, A
    ;}
return

#o::  ; Reset Transparency Settings
    WinSet, Transparent, 255, A
    WinSet, Transparent, OFF, A
return

#g::  ; Press Win+G to show the current settings of the window under the mouse.
    MouseGetPos,,, MouseWin
    WinGet, Transparent, Transparent, ahk_id %MouseWin%
    ToolTip Translucency:`t%Transparent%`n
    Sleep 2000
    ToolTip
return

Source via howtogeek.com

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