CTRL + n Firefox shortcut fails for n = 1 thru x, where x = no. of pinned tabs

What steps will reproduce the problem?
1. pin a tab or two
2. go to a tab
3. user Firefox keyboard shortcut   "CTRL + n"  to activate to one of the 
PINNED tabs.  Tab does not activate. 

What is the expected output?

pinned tab should be "active" tab (not sure if that's the proper nomenclature)

What do you see instead?

Nothing happens (to Firefox... me, I start seeing red.)

What version of the product are you using? On what operating syste

5.3.1build201101...  windows 7

Please provide any additional information below.

Client Configuration (automatically added by MLB)
OS: WINNT, Firefox 14.0.1, MLB 0.5.3.1Build201101051500
MLB Configuration:
mouselessbrowsing.idChars: 
mouselessbrowsing.modifierForOpenInNewTab: 1
mouselessbrowsing.exclusiveNumpad: false
mouselessbrowsing.keys.scrollDown: 1712
mouselessbrowsing.executeInstantlyWhenIdUnique: false
mouselessbrowsing.smartPositioning: true
mouselessbrowsing.keys.scrollUp: 1744
mouselessbrowsing.disableAutomaticPageUpdateOnChange: false
mouselessbrowsing.enableImgLinkIds: true
mouselessbrowsing.modifierForWritableElement: 2
mouselessbrowsing.modifierForOpenInNewWindow: 3
mouselessbrowsing.keys.clearKeybuffer: 432
mouselessbrowsing.executeAutomatic: false
mouselessbrowsing.showIdsOnDemand: false
mouselessbrowsing.version: 0.5.3.1Build201101051500
mouselessbrowsing.showTabIds: true
mouselessbrowsing.idType: NUMERIC
mouselessbrowsing.enableFormElementIds: true
mouselessbrowsing.keys.openInNewTabPostfixKey: 289
mouselessbrowsing.keys.openInCoolirisPreviewsPostfixKey: 1696
mouselessbrowsing.enableOtherIds: true
mouselessbrowsing.showMlbIconInStatusbar: true
mouselessbrowsing.keys.toggleAllIds: 1762
mouselessbrowsing.keys.toggleMLB: 1697
mouselessbrowsing.toggleExlNumpadWithDoubleStrokeNumKey: true
mouselessbrowsing.enableLinkIds: true
mouselessbrowsing.maxIdNumber: 1000
mouselessbrowsing.debug.perf: false
mouselessbrowsing.enableFrameIds: true
mouselessbrowsing.modifierForOpenInCoolirisPreviews: -1
mouselessbrowsing.showKeybufferInStatusbar: true
mouselessbrowsing.keys.addSiteRule: 1319
mouselessbrowsing.initOnDomContentLoaded: true
mouselessbrowsing.filterDuplicateLinks: true
mouselessbrowsing.keys.toggleEnableDisableMLB: 1761
mouselessbrowsing.siteRules: <listbox 
xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" 
id="siteRulesLB" prefid="mouselessbrowsing.siteRules" flex="1" 
disabled="false"><listhead><listheader label="URL Pattern"/><listheader 
align="center" style="display:none"/><listheader 
style="display:none"/><listheader 
style="display:none"/></listhead><listcols><listcol flex="1"/><listcol 
style="display:none"/><listcol style="display:none"/><listcol 
style="display:none"/></listcols><listitem label="" value=""><listcell 
label="*dictionary.com*" value="*dictionary.com*"/><listcell label="Hide Ids" 
value="NONE" style="display: none;"/><listcell label="false" value="false" 
style="display: none;"/><listcell label="true" value="true" style="display: 
none;"/></listitem><listitem label="" value=""><listcell 
label="*dictionary.reference.com*" 
value="*dictionary.reference.com*"/><listcell label="Hide Ids" value="NONE" 
style="display: none;"/><listcell label="false" value="false" style="display: 
none;"/><listcell label="true" value="true" style="display: 
none;"/></listitem></listbox>
mouselessbrowsing.keys.openConfig: 1239
mouselessbrowsing.disableAllIds: false
mouselessbrowsing.styleForFrameIdSpan: position:fixed; top:0; left:0;
font-size:xx-small;line-height:130%;;
border-color:black; border-width:1px; border-style:solid;
-moz-border-radius:2px;
padding:0px 2px 0px 2px;
z-index:500;
background-color:#D6E3FE;
mouselessbrowsing.keys.blurActiveElement: 0
mouselessbrowsing.autoExecuteDelay: 500
mouselessbrowsing.keys.openInNewWindowPostfixKey: 1776
mouselessbrowsing.keys.selectLink: 260
mouselessbrowsing.executeAutomaticNew: true
mouselessbrowsing.pixelsToScroll: 150
mouselessbrowsing.styleForIdSpan: font-family:arial, sans-serif; 
font-size:xx-small; line-height:130%;
border-width:1px; border-style:solid;-moz-border-radius:2px;
padding:0px 2px 0px 2px;
vertical-align:center;
margin-left:2px; 
max-width:20px; max-height:10px;
overflow:visible;float:none;
mouselessbrowsing.disableMLB: false
mouselessbrowsing.keys.historyBack: 1776
mouselessbrowsing.debug: false
mouselessbrowsing.keys.toggleExlusiveUseOfNumpad: 304
mouselessbrowsing.keys.blockKeyboardInputForMlb: 0
mouselessbrowsing.showMlbMenu: true
mouselessbrowsing.keys.updatePage: 1713
mouselessbrowsing.keys.historyForward: 1696
Original issue reported on code.google.com by joefiesta@verizon.net on 29 Nov 2012 at 2:50
iumo / mouselessbrowsing

CTRL + n Firefox shortcut fails for n = 1 thru x, where x = no. of pinned tabs #224
