Bug 423621: Grammar error in add-on installation dialog. r=robstrong

toolkit/locales/en-US/chrome/mozapps/xpinstall/xpinstallConfirm.dtd

@@ -2,7 +2,7 @@
 
 <!ENTITY dialog.title            "Software Installation">
 <!ENTITY dialog.style            "width: 45em">
-<!ENTITY warningMain.label       "Only install add-ons from authors whom you trust.">
+<!ENTITY warningPrimary.label    "Install add-ons only from authors whom you trust.">
 <!ENTITY warningSecondary.label  "Malicious software can damage your computer or violate your privacy.">
 
 <!ENTITY from.label "from:">

toolkit/mozapps/xpinstall/content/xpinstallConfirm.xul

@@ -60,7 +60,7 @@
     <hbox id="xpinstallheader" align="start">
       <image class="alert-icon"/>
       <vbox flex="1">
-        <description class="warning">&warningMain.label;</description>
+        <description class="warning">&warningPrimary.label;</description>
         <description>&warningSecondary.label;</description>
       </vbox>
     </hbox>