- Firefox-Version
 - Firefox 79 Nightly
 - Betriebssystem
 - Windows 10
 
Hi, nachfolgender Code ist installiert... seit ein paar Tagen wird mir ein schwarzes Fenster angeboten, wenn ich auf Hilfe, über Nightly klicke.
Liegt es am Code oder ist das ein Fehler in Nightly? Denn ohne Code sieht es genauso aus..
CSS
		
					
				    /* About : Dialog */
    
    
    @-moz-document url-prefix("chrome://browser/content/aboutDialog.xhtml"){
        
    #version::before {content: "Boersenfeger seine Nightly-Version ist:"; font-size:17px !important; font-weight: bold! important; 
    color:#F08080 !important;  margin-right: 6px !important;}
    
    #version {font-weight: bold! important; font-size:16px !important;}
    #version {margin-top: 30px !important; color: #FFFFFF !important;}
    
    #aboutDialog{height: 350px !important; }
    
    #agent {margin-left: -140px !important; margin-bottom: 10px ! important; max-height: 60px !important; margin-right: 84px !important; margin-top: 30px !important; padding-top: 5px !important;}
    
    #agent {-moz-appearance: none !important; border-radius:14px!important;}
    
    #agent .textbox-input-box {margin-top: -1px !important; margin-left: 12px !important;}
    
    #bottomBox {background-color: #202340 !important; margin-bottom: 30px !important;}
    
    #aboutDialog{background-color: #202340 !important;}
    
    #updateButton{ min-width: 360px !important; margin-top: 5px!important; margin-bottom: 5px !important;}
    
    #trademark { margin-bottom: -40px !important; margin-top: 16px !important; font-size: 15px !important; background-color: #202340 !important;}
    
    #leftBox {margin-top: 60px !important; }
    
    /* Build ID, about_Dialog css, Text mittig.*/
 
    window
    #aboutDialog vbox 
    #aboutDialogContainer hbox {font-size:15px !important;}
    #clientBox vbox {font-size:15px !important;}
    #rightBox textarea 
    #agent{
    text-align:center!important;
    margin-top: 5px!important;
    margin-bottom: 10px ! important;
    }
        
    #updateButton{ 
    -moz-appearance:none!important;
    background: gainsboro url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index1.gif")no-repeat !important;
    padding-left:30px!important;
    background-position:13px 3px!important;
    font-size:15px!important;
    border-radius:14px!important;
    border-color:red !important;
    border-style:outset !important;
    border-width:2px !important;
    color:black !important; 
    margin-bottom: 10px !important;
    margin-top: 10px !important;}
        
        
    #updateButton:hover{
    -moz-appearance:none!important;
    background: #B2EDFA url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index2.gif")no-repeat !important;
    padding-left:30px!important ;
    background-position:13px 3px!important;}
        
    #updateButton .button-box {
    padding-top: 0px!important;
    padding-bottom: 0px!important;
    -moz-padding-start: 3px!important;
    -moz-padding-end: 3px!important;}        
        
    [href="about:license"]{
    -moz-appearance:none!important;
    background: gainsboro url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index1.png")no-repeat !important;
    color:black!important;
    margin-left: 10px !important;
    margin-top: 2px !important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:20px!important;
    padding-left:40px!important;
    border-color:dodgerblue !important;
    border-style:outset !important;
    border-width:2px !important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
    [href="about:license"]:hover{
    -moz-appearance:none!important;
    background: #B2EDFA url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index2.png")no-repeat !important;
    color:black!important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:20px!important;
    padding-left:40px!important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
    
    [href="about:rights"]{
    -moz-appearance:none!important;
    background: gainsboro url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index3.png")no-repeat !important;
    color:black!important;
    margin-left: -28px !important;
    margin-right: 10px !important;
    margin-top: 2px !important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:20px!important;
    padding-left:40px!important;
    border-color:red !important;
    border-style:outset !important;
    border-width:2px!important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
    [href="about:rights"]:hover{
    -moz-appearance:none!important;
    background: #B2EDFA url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index4.png")no-repeat !important;
    color:black!important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:20px!important;
    padding-left:40px!important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
    [href="https://www.mozilla.org/privacy/"]{
    -moz-appearance:none!important;
    background: gainsboro url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index5.png")no-repeat !important;
    color:black!important;
    margin-left: 2px !important;
    margin-right: 10px !important;
    margin-top: 2px !important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:20px!important;
    padding-left:40px!important;
    border-color:green !important;
    border-style:outset !important;
    border-width:2px !important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
    [href="https://www.mozilla.org/privacy/"]:hover{
    -moz-appearance:none!important;
    background: #B2EDFA url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index6.png")no-repeat !important;
    color:black!important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:20px!important;
    padding-left:40px!important;
    background-position:10px 1px!important;
    border-radius:14px!important;}            
    
    
    [href="http://www.mozilla.org/"]{
    -moz-appearance:none!important;
    background: gainsboro url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index1.ico") no-repeat !important;
    color:black!important;
    margin-left: 2px !important;
    margin-right: 10px !important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:15px!important;
    padding-left:35px!important;
    border-color:cadetblue !important;
    border-style:outset !important;
    border-width:2px !important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
    [href="http://www.mozilla.org/"]:hover{
    -moz-appearance:none!important;
    background: #B2EDFA url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index1.ico") no-repeat !important;
    color:black!important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:15px!important;
    padding-left:35px!important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
    
    [href="about:credits"]{
    -moz-appearance:none!important;
    background: gainsboro url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index8.png") no-repeat !important;
    color:black!important;
    margin-left: 2px !important;
    margin-right: 10px !important;
    margin-top: 5px !important;
    margin-bottom: 5px !important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:15px!important;
    padding-left:35px!important;
    border-color:cadetblue !important;
    border-style:outset !important;
    border-width:2px !important;
    background-position:10px 1px!important;
    border-radius:14px!important;
    }
    [href="about:credits"]:hover{
    -moz-appearance:none!important;
    background: #B2EDFA url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index8.png") no-repeat !important;
    color:black!important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:15px!important;
    padding-left:35px!important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
            
    [href="http://www.mozilla.org/contribute/"]{
    -moz-appearance:none!important;
    background: gainsboro url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index9.png") no-repeat !important;
    color:black!important;
    margin-left: 2px !important;
    margin-right: 10px !important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:15px!important;
    padding-left:35px!important;
    border-color:cadetblue !important;
    border-style:outset !important;
    border-width:2px !important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
    [href="http://www.mozilla.org/contribute/"]:hover{
    -moz-appearance:none!important;
    background: #B2EDFA url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index9.png") no-repeat !important;
    color:black!important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:15px!important;
    padding-left:35px!important;
    background-position:10px 1px!important;
    border-radius:14px!important;}
    
    [href="https://sendto.mozilla.org/page/contribute/Give-Now?source=mozillaorg_default_footer&ref=firefox_about&utm_campaign=firefox_about&tm_source=firefox&tm_medium=referral&utm_content=20140929_FireFoxAbout"]{
    -moz-appearance:none!important;
    background: gainsboro url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index10.png") no-repeat !important;
    color:black!important;
    margin-left: 2px !important;
    margin-right: 4px !important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:15px!important;
    padding-left:35px!important;
    border-color:cadetblue !important;
    border-style:outset !important;
    border-width:2px !important;
    background-position:10px 2px!important;
    border-radius:14px!important;}
    [href="https://sendto.mozilla.org/page/contribute/Give-Now?source=mozillaorg_default_footer&ref=firefox_about&utm_campaign=firefox_about&tm_source=firefox&tm_medium=referral&utm_content=20140929_FireFoxAbout"]:hover{
    -moz-appearance:none!important;
    background: #B2EDFA url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index10.png") no-repeat !important;
    color:black!important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:15px!important;
    padding-left:35px!important;
    background-position:10px 2px!important;
    border-radius:14px!important;}
    
    #releasenotes{
    background: gainsboro url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index11.png") no-repeat !important;    
    color:black!important;
    margin-left: 10px !important;
    margin-right: 35px !important;
    font-size:15px!important;
    text-decoration:none!important;
    padding-right:20px!important;
    padding-left:30px!important;
    padding-bottom:1px !important;
    border-color:cadetblue !important;
    border-style:outset !important;
    border-width:2px !important;
    background-position:7px 3px!important;
    border-radius:14px!important;
    margin-top: 35px !important;
    }
    #releasenotes:hover{
    background: #B2EDFA url("file:///c:/Users/Martin/AppData/Roaming/Mozilla/Firefox/Profiles/5p31hc0i.Nightly/chrome/Icons/index11.png") no-repeat !important;
    color:black!important;
    margin-left: 10px !important;
    margin-right: 35px !important;
    font-size:15px!important;
    text-decoration:none!important;
    border-color:cadetblue !important;
    border-style:outset !important;
    border-width:2px !important;
    background-position:7px 3px!important;
    border-radius:14px!important;}            
    }
    
    /* Build ID about Dialog css, Test mittig.*/
    window#aboutDialog vbox#aboutDialogContainer hbox#clientBox vbox#rightBox textarea#agent{
    text-align:center!important;
    font-size:15px!important;
  }
	
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