Ribbon is a great new feature introduced by SharePoint 2010. It provides great user experience for users with elevated privileges, like contributors and site owners. However, for users with lease privilege, such as visitors and anonymous users, it seems like a big waste of page real estate. Because for those users, all ribbon provides are navigation breadcrumb and welcome control (user name with a drop down list on top-right corner).

So I have been asked to figure out a way to remove or hide the ribbon area from user with lease privilege, and here is how:

1. Open your SharePoint master page



<div id="signinlink"><a href="/_layouts/authenticate.aspx">User Login</a></div>

<Sharepoint:SPSecurityTrimmedControl runat="server" Permissions="ManageLists">
  Put Your Control Here ... such as ...
  <div id="s4-ribbonrow" class="s4-pr s4-ribbonrowhidetitle">
  ..........
  </div>

<style>
#signinlink{display:none;}
</style>
</SharePoint:SPSecurityTrimmedControl>

2. Save and publish master page


OR



<div class="signinlink">
<a href="/_layouts/authenticate.aspx">User Login</a>
<a href="/_layouts/signout.aspx" class="signout">Sign Out</a>

</div>

    <asp:LoginView runat="server">
    <AnonymousTemplate>
        <style type="text/css">
            #s4-ribbonrow { display: none; }
        </style>
    </AnonymousTemplate>
    <LoggedInTemplate>
    <style type="text/css">
            .signinlink { display: none; }
            .signout { display: block; }
      </style>
    </LoggedInTemplate>
</asp:LoginView>


Class in style.CSS
.signinlink
{
color:#093762 !important;
font:12px Arial;
font-weight:bold;
text-decoration:none;
padding-top:20px;
}
.signout
{
color:#093762 !important;
font:12px Arial;
font-weight:bold;
text-decoration:none;
display:none;
}

body {
background-color:#FFFFFF;
color:#676767;
font-family:Verdana,Arial,sans-serif;
font-size:8pt;
margin:0;
padding:0;
}

body #s4-bodyContainer{
min-width:760px;
background-color:#F1F0DF;
height:100%;
}

body #s4-ribbonrow{
min-height:43px;
/* [ReplaceColor(themeColor:"Dark2",themeShade:"0.9")] */ background-color:#7c7258;
overflow-y:hidden;
}
.ms-cui-topBar2 {
    border-bottom: 1px solid wheat;
    height: 43px;
}

.ms-siteactionsmenuhover{
/* [ReplaceColor(themeColor:"Dark2-Lighter")] */ border-color:wheat;
/* [RecolorImage(themeColor:"Dark2-Lightest",method:"Filling",includeRectangle:{x:0,y:489,width:1,height:11})] */ background:url("/_layouts/images/bgximg.png") repeat-x -0px -489px;
/* [ReplaceColor(themeColor:"Dark2",themeShade:"0.8")] */ background-color:#7c7258;
}

.ms-welcomeMenu.ms-SpLinkButtonActive{
/* [ReplaceColor(themeColor:"Dark2-Lighter")] */ border-color:wheat;
/* [RecolorImage(themeColor:"Dark2-Lightest",includeRectangle:{x:0,y:489,width:1,height:11})] */ background:url("/_layouts/images/bgximg.png") repeat-x -0px -489px;
/* [ReplaceColor(themeColor:"Dark2",themeShade:"0.8")] */ background-color:#7c7258;
}

.s4-breadcrumb-anchor:hover,.s4-breadcrumb-anchor-open,.ms-qatbutton:hover{
/* [ReplaceColor(themeColor:"Dark2-Lighter")] */ border-color:wheat;
/* [RecolorImage(themeColor:"Dark2-Lightest",includeRectangle:{x:0,y:489,width:1,height:11})] */ background:url("/_layouts/images/bgximg.png") repeat-x -0px -489px;
/* [ReplaceColor(themeColor:"Dark2")] */ background-color:#7c7258;
}

.ms-cui-tt-a:hover{
/* [ReplaceColor(themeColor:"Dark2",themeTint:"0.8")] */ border-color:wheat;
background:url("/_layouts/images/bgximg.png") repeat-x -0px -1000px;
color:#fff !important;
}


.s4-titletext
{   
    display:none;
}
.s4-socialdata-notif
{   
    display:none;
}
.s4-title {
-moz-background-clip:border;
-moz-background-inline-policy:continuous;
-moz-background-origin:padding;
background:white none repeat-x scroll 0 -1013px;
margin:0;
min-height:64px;
overflow-x:hidden;
padding:0 0 0 0px;
word-wrap:break-word;
width:1000px;
margin-left:auto;
margin-right:auto;
}

.s4-titlelogo {
padding:12px 10px 12px 0;
text-align:left;
vertical-align:middle;
}
body #s4-topheader2 {

display:block;
width:63%;
min-width:996px;
margin:0px auto;
border-left:1px #aca082 solid;
border-right:1px #aca082 solid;
background-color:#7c7258;

}


.s4-toplinks .s4-tn a.selected {
/* [ReplaceColor(themeColor:"Accent1-Medium")] */ border-color:wheat;
/* [ReplaceColor(themeColor:"Accent1-Lighter")] */ border-bottom-color:wheat;
/* [ReplaceColor(themeColor:"Accent1-Lightest")] */ border-top-color:wheat;
/* [RecolorImage(themeColor:"Light1")] */ background:url("/_layouts/images/selbg.png") repeat-x left top;
/* [ReplaceColor(themeColor:"Accent1",themeTint:"0.35")] */ background-color:#F1F0DF;
/* [ReplaceColor(themeColor:"Accent1",themeShade:"0.20")] */ color:black!important;
padding:4px 5px;
margin:0px 0px;
}

.s4-tn li.static > a:hover
{
/* [ReplaceColor(themeColor:"Accent1")] */ color:white;
text-decoration:underline;
}

.s4-tn li.static > .menu-item{
/* [ReplaceColor(themeColor:"Dark2")] */ color:white;
white-space:nowrap;
border:1px solid transparent;
padding:4px 10px;
display:inline-block;
height:15px;
vertical-align:middle;
}



body #s4-mainarea
{
clear:none;
    width:63%;
    min-width:996px;
    float:none;
    margin-left:auto;
    margin-right:auto;
    padding-top:36px;
    background-color:white;
    border:1px #aca082 solid;
    height:100%;
}
.Fmenu {
font-family:Arial,Helvetica,sans-serif;
font-size:11px;
height:30px;
margin-right:0;
text-transform:uppercase;
width:85%;
margin-left:auto;
margin-right:auto;
text-align:center;
}
.Fmenu ul {
color:#6A72A3;
font-size:11px;
list-style-image:none;
margin:0;
padding:10px 0px 0 0;
}
.Fmenu ul li {
font-family:Arial;
font-size:11px !important;
}

.Fmenu ul li {
list-style-type:none;
}

.Fmenu ul li {
color:#6A72A3;
display:inline;
list-style-type:none;
margin:0;
padding:0;
}
.Fmenu ul li a {
color:#6A72A3 !important;
display:inline;
list-style-type:none;
margin:0;
padding:0;
font-size:11px !important;
font-family:Arial !important;
}
body #s4-leftpanel-content {
background-color:white;
border-color:gray;
border-style:solid;
border-width:0 1px 0 0;
padding:0 0 5px;
}
.s4-ql ul.root ul > li > a {
border-style:solid;
color:#6A72A3;
word-wrap:break-word;
}
.s4-ql ul.root > li > .menu-item, .s4-qlheader, .s4-qlheader:visited {
border-style:solid;
color:#6A72A3;
font-size:1.2em;
word-wrap:break-word;
}
.s4-titlelogo {
padding:0px 2px 0px 2px;
text-align:left;
vertical-align:middle;
background-color:#E1DAC8;
border-top:1px #aca082 solid;
border-left:1px #aca082 solid;
border-right:1px #aca082 solid;
border-bottom:1px #aca082 solid;


}
.s4-ql ul.root > li > .menu-item, .s4-qlheader, .s4-qlheader:visited {
border-style:solid;
color:#6A72A3;
font-size:8pt;
font-weight:normal;
word-wrap:break-word;
}
body #s4-leftpanel {
float:left;
width:180px;
}
.s4-ca {
-moz-background-clip:border;
-moz-background-inline-policy:continuous;
-moz-background-origin:padding;
background:#FFFFFF none repeat scroll 0 0;
margin-left:195px;
margin-right:0;
min-height:324px;
}
.s4-specialNavLinkList {
display:none;}
body #s4-leftpanel-content {
background-color:white;
border-color:gray;
border-style:solid;
border-width:0 1px 0 0;
min-height:390px;
padding:0 0 5px;
}
.s4-ql ul > li > a:hover, .s4-ql ul.root > li > a:hover, .s4-qlheader:hover
{
    text-decoration:none;
    color:#e19c57;
}
.signinlink
{
color:#666 !important;
font-family:Tahoma;
text-decoration:none;
}
.ms-titlerowborder {
border-right:0 solid #B8BABD;
}
.flashdiv
{
    width:999px;
    margin-left:auto;
    margin-right:auto;
}
.s4-recentchanges {
border-bottom:1px solid #DBDDDE;
display:none;
margin-bottom:10px;
padding:5px 0 10px;
}
.ms-rteTable-default, .ms-rteTableHeaderFirstCol-default, .ms-rteTableHeaderLastCol-default, .ms-rteTableHeaderOddCol-default, .ms-rteTableHeaderEvenCol-default, .ms-rteTableFirstCol-default, .ms-rteTableLastCol-default, .ms-rteTableOddCol-default, .ms-rteTableEvenCol-default, .ms-rteTableFooterFirstCol-default, .ms-rteTableFooterLastCol-default, .ms-rteTableFooterOddCol-default, .ms-rteTableFooterEvenCol-default, td.ms-rteTable-default, th.ms-rteTable-default, .ms-rtetablecells {
border:0px solid #C4C4C4;
padding:2px;
vertical-align:top;
}
.practice a {
color:#000000 !important;
}
.practice a:hover {
color:#d9802c  !important;
}
.ms-WPBody td {
font-family:verdana,arial,helvetica,sans-serif;
font-size:8pt;
}
.heading_text_22 {
color:#939598;
font-family:verdana,arial,helvetica,sans-serif;
font-size:8pt;
font-size-adjust:none;
font-style:normal;
font-variant:normal;
font-weight:bold;
line-height:15px;
text-align:justify;
text-decoration:none;
text-transform:uppercase;
padding-left:16px;

}

.Heading_text_2 {
-x-system-font:none;
color:#6A72A3;
font-family:verdana,arial,helvetica,sans-serif;
font-size:8pt;
font-size-adjust:none;
font-stretch:normal;
font-style:normal;
font-variant:normal;
font-weight:bold;
line-height:15px;
padding-left:16px;
padding-right:10px;
text-align:justify;
text-decoration:none;
text-transform:uppercase;
vertical-align:top;
white-space:nowrap;
}
.ms-rte-layoutszone-inner {
border:medium none;
margin:0;
overflow:hidden;
padding:0;
word-wrap:break-word;
}
.s4-ql a.selected {
-moz-background-clip:border;
-moz-background-inline-policy:continuous;
-moz-background-origin:padding;
background:transparent no-repeat scroll  left  top  none;
border-color:#C6E5F8 #91CDF2 #91CDF2 !important;
border-width:0px !important;
color:#003759 !important;
padding-left:9px !important;
}
.s4-statusbarcontainer
{
    display:none !important;
}
body #pageStatusBar {
border-style:solid;
border-width:1px 0;
    display:none !important;
font-family:verdana;
font-size:1em;
padding:4px 5px 5px 10px;
}
td.heading_text_33 {
color:#000000;
font-family:Arial,Helvetica,sans-serif;
font-size:12px;
font-weight:normal;
line-height:15px;
padding-left:16px;
text-align:justify;
text-decoration:none;
}
.headingtext
{
    border-bottom:2px solid #6A72A3;
}
.ms-rtetablecells a, .ms-rtetablecells1 a{
    color:#003399;
}
.ms-rtetablecells a:hover, .ms-rtetablecells1 a:hover{
    color:#d9802c;
    text-decoration:none;
}
.emaillink a {
color:#D9802C !important;
}
.uemaillink a {
color:#D9802C !important;
}
.uemaillink a:hover {
color:#848284 !important;
}
.dirlink a {
color:#D9802C !important;
}

Find this file, look in your IIS directory for your SharePoint site and look for the App_Browsers folder. Mine file was located at:

C:\inetpub\wwwroot\wss\VirtualDirectories\portal.contoso.com80\App_Browsers\compat.browse
 

Option 1 - Modify the compat.broswer file

<capability name="isMobileDevice" value="true" />
 
for each device in the file located at your Web Application system file location e.g.
C:\inetpub\wwwroot\wss\VirtualDirectories\nbsp80\App_Browsers\compat.browse.
To:

<capability name="isMobileDevice" value="false" />

For each device in the file. I actually tried this and did a find replace on all.

Option 2 - Modify the web.config file

For this fix in the web.config file. Simply add this block in the 'configuration/system.web' child elements:

<browserCaps>
<result type="System.Web.Mobile.MobileCapabilities, System.Web.Mobile, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
<filter>isMobileDevice=false</filter>
</browserCaps>