The Tor Browser: toolkit/mozapps/plugins/content/pluginInstallerWizard.js@6474c204b198 (annotated)

toolkit/mozapps/plugins/content/pluginInstallerWizard.js@6474c204b198 (annotated)

toolkit/mozapps/plugins/content/pluginInstallerWizard.js

Wed, 31 Dec 2014 06:09:35 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 06:09:35 +0100
changeset 0: 6474c204b198
permissions: -rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 function nsPluginInstallerWizard(){
   // create the request array
   this.mPluginRequests = new Map();
   // create the plugin info array.
   // a hash indexed by plugin id so we don't install
   // the same plugin more than once.
   this.mPluginInfoArray = new Object();
   this.mPluginInfoArrayLength = 0;
   // holds plugins we couldn't find
   this.mPluginNotFoundArray = new Object();
   this.mPluginNotFoundArrayLength = 0;
   // array holding pids of plugins that require a license
   this.mPluginLicenseArray = new Array();
   // how many plugins are to be installed
   this.pluginsToInstallNum = 0;
   this.mBrowser = null;
   this.mSuccessfullPluginInstallation = 0;
   this.mNeedsRestart = false;
   // arguments[0] is an object that contains two items:
   //     a mimetype->pluginInfo map of missing plugins,
   //     a reference to the browser that needs them,
   //        so we can notify which browser can be reloaded.
   if ("arguments" in window) {
     for (let [mimetype, pluginInfo] of window.arguments[0].plugins){
       this.mPluginRequests.set(mimetype, new nsPluginRequest(pluginInfo));
     }
     this.mBrowser = window.arguments[0].browser;
   }
   this.WSPluginCounter = 0;
   this.licenseAcceptCounter = 0;
   this.prefBranch = null;
 }
 nsPluginInstallerWizard.prototype.getPluginData = function (){
   // for each mPluginRequests item, call the datasource
   this.WSPluginCounter = 0;
   // initiate the datasource call
   var rdfUpdater = new nsRDFItemUpdater(this.getOS(), this.getChromeLocale());
   for (let [mimetype, pluginRequest] of this.mPluginRequests) {
     rdfUpdater.checkForPlugin(pluginRequest);
   }
 }
 // aPluginInfo is null if the datasource call failed, and pid is -1 if
 // no matching plugin was found.
 nsPluginInstallerWizard.prototype.pluginInfoReceived = function (aPluginRequestItem, aPluginInfo){
   this.WSPluginCounter++;
   if (aPluginInfo && (aPluginInfo.pid != -1) ) {
     // hash by id
     this.mPluginInfoArray[aPluginInfo.pid] = new PluginInfo(aPluginInfo);
     this.mPluginInfoArrayLength++;
   } else {
     this.mPluginNotFoundArray[aPluginRequestItem.mimetype] = aPluginRequestItem;
     this.mPluginNotFoundArrayLength++;
   }
   var progressMeter = document.getElementById("ws_request_progress");
   if (progressMeter.getAttribute("mode") == "undetermined")
     progressMeter.setAttribute("mode", "determined");
   progressMeter.setAttribute("value",
       ((this.WSPluginCounter / this.mPluginRequests.size) * 100) + "%");
   if (this.WSPluginCounter == this.mPluginRequests.size) {
     // check if no plugins were found
     if (this.mPluginInfoArrayLength == 0) {
       this.advancePage("lastpage");
     } else {
       this.advancePage(null);
     }
   } else {
     // process more.
   }
 }
 nsPluginInstallerWizard.prototype.showPluginList = function (){
   var myPluginList = document.getElementById("pluginList");
   var hasPluginWithInstallerUI = false;
   // clear children
   for (var run = myPluginList.childNodes.length; run > 0; run--)
     myPluginList.removeChild(myPluginList.childNodes.item(run));
   this.pluginsToInstallNum = 0;
   for (var pluginInfoItem in this.mPluginInfoArray){
     // [plugin image] [Plugin_Name Plugin_Version]
     var pluginInfo = this.mPluginInfoArray[pluginInfoItem];
     // create the checkbox
     var myCheckbox = document.createElement("checkbox");
     myCheckbox.setAttribute("checked", "true");
     myCheckbox.setAttribute("oncommand", "gPluginInstaller.toggleInstallPlugin('" + pluginInfo.pid + "', this)");
     // XXXlocalize (nit)
     myCheckbox.setAttribute("label", pluginInfo.name + " " + (pluginInfo.version ? pluginInfo.version : ""));
     myCheckbox.setAttribute("src", pluginInfo.IconUrl);
     myPluginList.appendChild(myCheckbox);
     if (pluginInfo.InstallerShowsUI == "true")
       hasPluginWithInstallerUI = true;
     // keep a running count of plugins the user wants to install
     this.pluginsToInstallNum++;
   }
   if (hasPluginWithInstallerUI)
     document.getElementById("installerUI").hidden = false;
   this.canAdvance(true);
   this.canRewind(false);
 }
 nsPluginInstallerWizard.prototype.toggleInstallPlugin = function (aPid, aCheckbox) {
   this.mPluginInfoArray[aPid].toBeInstalled = aCheckbox.checked;
   // if no plugins are checked, don't allow to advance
   this.pluginsToInstallNum = 0;
   for (var pluginInfoItem in this.mPluginInfoArray){
     if (this.mPluginInfoArray[pluginInfoItem].toBeInstalled)
       this.pluginsToInstallNum++;
   }
   if (this.pluginsToInstallNum > 0)
     this.canAdvance(true);
   else
     this.canAdvance(false);
 }
 nsPluginInstallerWizard.prototype.canAdvance = function (aBool){
   document.getElementById("plugin-installer-wizard").canAdvance = aBool;
 }
 nsPluginInstallerWizard.prototype.canRewind = function (aBool){
   document.getElementById("plugin-installer-wizard").canRewind = aBool;
 }
 nsPluginInstallerWizard.prototype.canCancel = function (aBool){
   document.documentElement.getButton("cancel").disabled = !aBool;
 }
 nsPluginInstallerWizard.prototype.showLicenses = function (){
   this.canAdvance(false);
   this.canRewind(false);
   // only add if a license is provided and the plugin was selected to
   // be installed
   for (var pluginInfoItem in this.mPluginInfoArray){
     var myPluginInfoItem = this.mPluginInfoArray[pluginInfoItem];
     if (myPluginInfoItem.toBeInstalled && myPluginInfoItem.licenseURL && (myPluginInfoItem.licenseURL != ""))
       this.mPluginLicenseArray.push(myPluginInfoItem.pid);
   }
   if (this.mPluginLicenseArray.length == 0) {
     // no plugins require licenses
     this.advancePage(null);
   } else {
     this.licenseAcceptCounter = 0;
     // add a nsIWebProgress listener to the license iframe.
     var docShell = document.getElementById("licenseIFrame").docShell;
     var iiReq = docShell.QueryInterface(Components.interfaces.nsIInterfaceRequestor);
     var webProgress = iiReq.getInterface(Components.interfaces.nsIWebProgress);
     webProgress.addProgressListener(gPluginInstaller.progressListener,
                                     Components.interfaces.nsIWebProgress.NOTIFY_ALL);
     this.showLicense();
   }
 }
 nsPluginInstallerWizard.prototype.enableNext = function (){
   // if only one plugin exists, don't enable the next button until
   // the license is accepted
   if (gPluginInstaller.pluginsToInstallNum > 1)
     gPluginInstaller.canAdvance(true);
   document.getElementById("licenseRadioGroup1").disabled = false;
   document.getElementById("licenseRadioGroup2").disabled = false;
 }
 const nsIWebProgressListener = Components.interfaces.nsIWebProgressListener;
 nsPluginInstallerWizard.prototype.progressListener = {
   onStateChange : function(aWebProgress, aRequest, aStateFlags, aStatus)
   {
     if ((aStateFlags & nsIWebProgressListener.STATE_STOP) &&
        (aStateFlags & nsIWebProgressListener.STATE_IS_NETWORK)) {
       // iframe loaded
       gPluginInstaller.enableNext();
     }
   },
   onProgressChange : function(aWebProgress, aRequest, aCurSelfProgress,
                               aMaxSelfProgress, aCurTotalProgress, aMaxTotalProgress)
   {},
   onStatusChange : function(aWebProgress, aRequest, aStatus, aMessage)
   {},
   QueryInterface : function(aIID)
   {
      if (aIID.equals(Components.interfaces.nsIWebProgressListener) ||
          aIID.equals(Components.interfaces.nsISupportsWeakReference) ||
          aIID.equals(Components.interfaces.nsISupports))
        return this;
      throw Components.results.NS_NOINTERFACE;
    }
 }
 nsPluginInstallerWizard.prototype.showLicense = function (){
   var pluginInfo = this.mPluginInfoArray[this.mPluginLicenseArray[this.licenseAcceptCounter]];
   this.canAdvance(false);
   var loadFlags = Components.interfaces.nsIWebNavigation.LOAD_FLAGS_NONE;
   document.getElementById("licenseIFrame").webNavigation.loadURI(pluginInfo.licenseURL, loadFlags, null, null, null);
   document.getElementById("pluginLicenseLabel").firstChild.nodeValue =
     this.getFormattedString("pluginLicenseAgreement.label", [pluginInfo.name]);
   document.getElementById("licenseRadioGroup1").disabled = true;
   document.getElementById("licenseRadioGroup2").disabled = true;
   document.getElementById("licenseRadioGroup").selectedIndex =
     pluginInfo.licenseAccepted ? 0 : 1;
 }
 nsPluginInstallerWizard.prototype.showNextLicense = function (){
   var rv = true;
   if (this.mPluginLicenseArray.length > 0) {
     this.storeLicenseRadioGroup();
     this.licenseAcceptCounter++;
     if (this.licenseAcceptCounter < this.mPluginLicenseArray.length) {
       this.showLicense();
       rv = false;
       this.canRewind(true);
     }
   }
   return rv;
 }
 nsPluginInstallerWizard.prototype.showPreviousLicense = function (){
   this.storeLicenseRadioGroup();
   this.licenseAcceptCounter--;
   if (this.licenseAcceptCounter > 0)
     this.canRewind(true);
   else
     this.canRewind(false);
   this.showLicense();
   // don't allow to return from the license screens
   return false;
 }
 nsPluginInstallerWizard.prototype.storeLicenseRadioGroup = function (){
   var pluginInfo = this.mPluginInfoArray[this.mPluginLicenseArray[this.licenseAcceptCounter]];
   pluginInfo.licenseAccepted = !document.getElementById("licenseRadioGroup").selectedIndex;
 }
 nsPluginInstallerWizard.prototype.licenseRadioGroupChange = function(aAccepted) {
   // only if one plugin is to be installed should selection change the next button
   if (this.pluginsToInstallNum == 1)
     this.canAdvance(aAccepted);
 }
 nsPluginInstallerWizard.prototype.advancePage = function (aPageId){
   this.canAdvance(true);
   document.getElementById("plugin-installer-wizard").advance(aPageId);
 }
 nsPluginInstallerWizard.prototype.startPluginInstallation = function (){
   this.canAdvance(false);
   this.canRewind(false);
   var installerPlugins = [];
   var xpiPlugins = [];
   for (var pluginInfoItem in this.mPluginInfoArray){
     var pluginItem = this.mPluginInfoArray[pluginInfoItem];
     if (pluginItem.toBeInstalled && pluginItem.licenseAccepted) {
       if (pluginItem.InstallerLocation)
         installerPlugins.push(pluginItem);
       else if (pluginItem.XPILocation)
         xpiPlugins.push(pluginItem);
     }
   }
   if (installerPlugins.length > 0 || xpiPlugins.length > 0)
     PluginInstallService.startPluginInstallation(installerPlugins,
                                                  xpiPlugins);
   else
     this.advancePage(null);
 }
 /*
 starting download
 download finished
 starting installation
 finished installation
 all done
 */
 nsPluginInstallerWizard.prototype.pluginInstallationProgress = function (aPid, aProgress, aError) {
   var statMsg = null;
   var pluginInfo = gPluginInstaller.mPluginInfoArray[aPid];
   switch (aProgress) {
     case 0:
       statMsg = this.getFormattedString("pluginInstallation.download.start", [pluginInfo.name]);
       break;
     case 1:
       statMsg = this.getFormattedString("pluginInstallation.download.finish", [pluginInfo.name]);
       break;
     case 2:
       statMsg = this.getFormattedString("pluginInstallation.install.start", [pluginInfo.name]);
       var progressElm = document.getElementById("plugin_install_progress");
       progressElm.setAttribute("mode", "undetermined");
       break;
     case 3:
       if (aError) {
         statMsg = this.getFormattedString("pluginInstallation.install.error", [pluginInfo.name, aError]);
         pluginInfo.error = aError;
       } else {
         statMsg = this.getFormattedString("pluginInstallation.install.finish", [pluginInfo.name]);
         pluginInfo.error = null;
       }
       break;
     case 4:
       statMsg = this.getString("pluginInstallation.complete");
       break;
   }
   if (statMsg)
     document.getElementById("plugin_install_progress_message").value = statMsg;
   if (aProgress == 4) {
     this.advancePage(null);
   }
 }
 nsPluginInstallerWizard.prototype.pluginInstallationProgressMeter = function (aPid, aValue, aMaxValue){
   var progressElm = document.getElementById("plugin_install_progress");
   if (progressElm.getAttribute("mode") == "undetermined")
     progressElm.setAttribute("mode", "determined");
   progressElm.setAttribute("value", Math.ceil((aValue / aMaxValue) * 100) + "%")
 }
 nsPluginInstallerWizard.prototype.addPluginResultRow = function (aImgSrc, aName, aNameTooltip, aStatus, aStatusTooltip, aManualUrl){
   var myRows = document.getElementById("pluginResultList");
   var myRow = document.createElement("row");
   myRow.setAttribute("align", "center");
   // create the image
   var myImage = document.createElement("image");
   myImage.setAttribute("src", aImgSrc);
   myImage.setAttribute("height", "16px");
   myImage.setAttribute("width", "16px");
   myRow.appendChild(myImage)
   // create the labels
   var myLabel = document.createElement("label");
   myLabel.setAttribute("value", aName);
   if (aNameTooltip)
     myLabel.setAttribute("tooltiptext", aNameTooltip);
   myRow.appendChild(myLabel);
   if (aStatus) {
     myLabel = document.createElement("label");
     myLabel.setAttribute("value", aStatus);
     myRow.appendChild(myLabel);
   }
   // manual install
   if (aManualUrl) {
     var myButton = document.createElement("button");
     var manualInstallLabel = this.getString("pluginInstallationSummary.manualInstall.label");
     var manualInstallTooltip = this.getString("pluginInstallationSummary.manualInstall.tooltip");
     myButton.setAttribute("label", manualInstallLabel);
     myButton.setAttribute("tooltiptext", manualInstallTooltip);
     myRow.appendChild(myButton);
     // XXX: XUL sucks, need to add the listener after it got added into the document
     if (aManualUrl)
       myButton.addEventListener("command", function() { gPluginInstaller.loadURL(aManualUrl) }, false);
   }
   myRows.appendChild(myRow);
 }
 nsPluginInstallerWizard.prototype.showPluginResults = function (){
   var notInstalledList = "?action=missingplugins";
   var myRows = document.getElementById("pluginResultList");
   // clear children
   for (var run = myRows.childNodes.length; run--; run > 0)
     myRows.removeChild(myRows.childNodes.item(run));
   for (var pluginInfoItem in this.mPluginInfoArray){
     // [plugin image] [Plugin_Name Plugin_Version] [Success/Failed] [Manual Install (if Failed)]
     var myPluginItem = this.mPluginInfoArray[pluginInfoItem];
     if (myPluginItem.toBeInstalled) {
       var statusMsg;
       var statusTooltip;
       if (myPluginItem.error){
         statusMsg = this.getString("pluginInstallationSummary.failed");
         statusTooltip = myPluginItem.error;
         notInstalledList += "&mimetype=" + pluginInfoItem;
       } else if (!myPluginItem.licenseAccepted) {
         statusMsg = this.getString("pluginInstallationSummary.licenseNotAccepted");
       } else if (!myPluginItem.XPILocation && !myPluginItem.InstallerLocation) {
         statusMsg = this.getString("pluginInstallationSummary.notAvailable");
         notInstalledList += "&mimetype=" + pluginInfoItem;
       } else {
         this.mSuccessfullPluginInstallation++;
         statusMsg = this.getString("pluginInstallationSummary.success");
         // only check needsRestart if the plugin was successfully installed.
         if (myPluginItem.needsRestart)
           this.mNeedsRestart = true;
       }
       // manual url - either returned from the webservice or the pluginspage attribute
       var manualUrl;
       if ((myPluginItem.error || (!myPluginItem.XPILocation && !myPluginItem.InstallerLocation)) &&
           (myPluginItem.manualInstallationURL || this.mPluginRequests.get(myPluginItem.requestedMimetype).pluginsPage)){
         manualUrl = myPluginItem.manualInstallationURL ? myPluginItem.manualInstallationURL : this.mPluginRequests.get(myPluginItem.requestedMimetype).pluginsPage;
       }
       this.addPluginResultRow(
           myPluginItem.IconUrl,
           myPluginItem.name + " " + (myPluginItem.version ? myPluginItem.version : ""),
           null,
           statusMsg,
           statusTooltip,
           manualUrl);
     }
   }
   // handle plugins we couldn't find
   for (pluginInfoItem in this.mPluginNotFoundArray){
     var pluginRequest = this.mPluginNotFoundArray[pluginInfoItem];
     // if there is a pluginspage, show UI
     if (pluginRequest.pluginsPage) {
       this.addPluginResultRow(
           "",
           this.getFormattedString("pluginInstallation.unknownPlugin", [pluginInfoItem]),
           null,
           null,
           null,
           pluginRequest.pluginsPage);
     }
     notInstalledList += "&mimetype=" + pluginInfoItem;
   }
   // no plugins were found, so change the description of the final page.
   if (this.mPluginInfoArrayLength == 0) {
     var noPluginsFound = this.getString("pluginInstallation.noPluginsFound");
     document.getElementById("pluginSummaryDescription").setAttribute("value", noPluginsFound);
   } else if (this.mSuccessfullPluginInstallation == 0) {
     // plugins found, but none were installed.
     var noPluginsInstalled = this.getString("pluginInstallation.noPluginsInstalled");
     document.getElementById("pluginSummaryDescription").setAttribute("value", noPluginsInstalled);
   }
   document.getElementById("pluginSummaryRestartNeeded").hidden = !this.mNeedsRestart;
   var app = Components.classes["@mozilla.org/xre/app-info;1"]
                       .getService(Components.interfaces.nsIXULAppInfo);
   // set the get more info link to contain the mimetypes we couldn't install.
   notInstalledList +=
     "&appID=" + app.ID +
     "&appVersion=" + app.platformBuildID +
     "&clientOS=" + this.getOS() +
     "&chromeLocale=" + this.getChromeLocale() +
     "&appRelease=" + app.version;
   document.getElementById("moreInfoLink").addEventListener("click", function() { gPluginInstaller.loadURL("https://pfs.mozilla.org/plugins/" + notInstalledList) }, false);
   if (this.mNeedsRestart) {
     var cancel = document.getElementById("plugin-installer-wizard").getButton("cancel");
     cancel.label = this.getString("pluginInstallation.close.label");
     cancel.accessKey = this.getString("pluginInstallation.close.accesskey");
     var finish = document.getElementById("plugin-installer-wizard").getButton("finish");
     finish.label = this.getFormattedString("pluginInstallation.restart.label", [app.name]);
     finish.accessKey = this.getString("pluginInstallation.restart.accesskey");
     this.canCancel(true);
   }
   else {
     this.canCancel(false);
   }
   this.canAdvance(true);
   this.canRewind(false);
 }
 nsPluginInstallerWizard.prototype.loadURL = function (aUrl){
   // Check if the page where the plugin came from can load aUrl before
   // loading it, and do *not* allow loading URIs that would inherit our
   // principal.
   var pluginPagePrincipal =
     window.opener.content.document.nodePrincipal;
   const nsIScriptSecurityManager =
     Components.interfaces.nsIScriptSecurityManager;
   var secMan = Components.classes["@mozilla.org/scriptsecuritymanager;1"]
                          .getService(nsIScriptSecurityManager);
   secMan.checkLoadURIStrWithPrincipal(pluginPagePrincipal, aUrl,
     nsIScriptSecurityManager.DISALLOW_INHERIT_PRINCIPAL);
   window.opener.open(aUrl);
 }
 nsPluginInstallerWizard.prototype.getString = function (aName){
   return document.getElementById("pluginWizardString").getString(aName);
 }
 nsPluginInstallerWizard.prototype.getFormattedString = function (aName, aArray){
   return document.getElementById("pluginWizardString").getFormattedString(aName, aArray);
 }
 nsPluginInstallerWizard.prototype.getOS = function (){
   var httpService = Components.classes["@mozilla.org/network/protocol;1?name=http"]
                               .getService(Components.interfaces.nsIHttpProtocolHandler);
   return httpService.oscpu;
 }
 nsPluginInstallerWizard.prototype.getChromeLocale = function (){
   var chromeReg = Components.classes["@mozilla.org/chrome/chrome-registry;1"]
                             .getService(Components.interfaces.nsIXULChromeRegistry);
   return chromeReg.getSelectedLocale("global");
 }
 nsPluginInstallerWizard.prototype.getPrefBranch = function (){
   if (!this.prefBranch)
     this.prefBranch = Components.classes["@mozilla.org/preferences-service;1"]
                                 .getService(Components.interfaces.nsIPrefBranch);
   return this.prefBranch;
 }
 function nsPluginRequest(aPlugRequest){
   this.mimetype = encodeURI(aPlugRequest.mimetype);
   this.pluginsPage = aPlugRequest.pluginsPage;
 }
 function PluginInfo(aResult) {
   this.name = aResult.name;
   this.pid = aResult.pid;
   this.version = aResult.version;
   this.IconUrl = aResult.IconUrl;
   this.InstallerLocation = aResult.InstallerLocation;
   this.InstallerHash = aResult.InstallerHash;
   this.XPILocation = aResult.XPILocation;
   this.XPIHash = aResult.XPIHash;
   this.InstallerShowsUI = aResult.InstallerShowsUI;
   this.manualInstallationURL = aResult.manualInstallationURL;
   this.requestedMimetype = aResult.requestedMimetype;
   this.licenseURL = aResult.licenseURL;
   this.needsRestart = (aResult.needsRestart == "true");
   this.error = null;
   this.toBeInstalled = true;
   // no license provided, make it accepted
   this.licenseAccepted = this.licenseURL ? false : true;
 }
 var gPluginInstaller;
 function wizardInit(){
   gPluginInstaller = new nsPluginInstallerWizard();
   gPluginInstaller.canAdvance(false);
   gPluginInstaller.getPluginData();
 }
 function wizardFinish(){
   if (gPluginInstaller.mNeedsRestart) {
     // Notify all windows that an application quit has been requested.
     var os = Components.classes["@mozilla.org/observer-service;1"]
                        .getService(Components.interfaces.nsIObserverService);
     var cancelQuit = Components.classes["@mozilla.org/supports-PRBool;1"]
                                .createInstance(Components.interfaces.nsISupportsPRBool);
     os.notifyObservers(cancelQuit, "quit-application-requested", "restart");
     // Something aborted the quit process.
     if (!cancelQuit.data) {
       var nsIAppStartup = Components.interfaces.nsIAppStartup;
       var appStartup = Components.classes["@mozilla.org/toolkit/app-startup;1"]
                                  .getService(nsIAppStartup);
       appStartup.quit(nsIAppStartup.eAttemptQuit | nsIAppStartup.eRestart);
       return true;
     }
   }
   // don't refresh if no plugins were found or installed
   if ((gPluginInstaller.mSuccessfullPluginInstallation > 0) &&
       (gPluginInstaller.mPluginInfoArray.length != 0)) {
     // reload plugins so JS detection works immediately
     try {
       var ph = Components.classes["@mozilla.org/plugin/host;1"]
                          .getService(Components.interfaces.nsIPluginHost);
       ph.reloadPlugins(false);
     }
     catch (e) {
       // reloadPlugins throws an exception if there were no plugins to load
     }
     if (gPluginInstaller.mBrowser) {
       // notify listeners that a plugin is installed,
       // so that they can reset the UI and update the browser.
       var event = document.createEvent("Events");
       event.initEvent("NewPluginInstalled", true, true);
       gPluginInstaller.mBrowser.dispatchEvent(event);
     }
   }
   return true;
 }