Load styles with a chrome security principal. Fix default objects in JS completion. Don't echo during :map <silent>

content/buffer.js

@@ -73,7 +73,7 @@ function Buffer() //{{{
                           "@namespace xul url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);\n";
         const Sheet = new Struct("name", "sites", "css", "ref");
 
-        let cssUri = function (css) "data:text/css," + encodeURI(css);
+        let cssUri = function (css) "chrome-data:text/css," + encodeURI(css);
 
         let userSheets = [];
         let systemSheets = [];
@@ -259,7 +259,7 @@ function Buffer() //{{{
             }
             if (errors.length)
             {
-                let err = new Error("", errors[0].sourceName.replace(/^(data:text\/css,).*/, "$1..."), errors[0].lineNumber);
+                let err = new Error("", errors[0].sourceName.replace(/^(chrome-data:text\/css,).*/, "$1..."), errors[0].lineNumber);
                 err.name = "CSSError"
                 err.message = errors.reduce(function (msg, e) msg + "; " + e.lineNumber + ": " + e.errorMessage, errors.shift().errorMessage);
                 err.echoerr = err.fileName + ":" + err.lineNumber + ": " + err.message;

content/completion.js

@@ -410,7 +410,7 @@ function Completion() //{{{
                 let end = (frame == -1 ? lastIdx : get(frame + 1)[OFFSET]);
 
                 cacheKey = null;
-                let obj = [liberator, window]; // Default objects;
+                let obj = [modules, window]; // Default objects;
                 /* Is this an object dereference? */
                 if (dot < statement) // No.
                     dot = statement - 1;

content/io.js

@@ -798,8 +798,11 @@ lookup:
                     }
                     catch (e)
                     {
-                        e.echoerr = file.path + ":" + e.lineNumber + ": " + e;
-                        throw e;
+                        let err = new Error();
+                        for (let [k, v] in Iterator(e))
+                            err[k] = v;
+                        err.echoerr = file.path + ":" + e.lineNumber + ": " + e;
+                        throw err;
                     }
                 }
                 else if (/\.css$/.test(filename))

content/ui.js

@@ -621,6 +621,8 @@ function CommandLine() //{{{
             var focused = document.commandDispatcher.focusedElement;
             if (focused && focused == commandWidget.inputField || focused == multilineInputWidget.inputField)
                 return false;
+            if (silent)
+                return false;
 
             highlightGroup = highlightGroup || this.HL_NORMAL;