Merge commit '50d3e596bbe89c95615f96eb71f6bc5be737a1db' into Basilisk-releasev2018.07.18

# Conflicts:
#	browser/app/profile/firefox.js
#	browser/components/preferences/jar.mn

1 files changed, 646 insertions, 0 deletions

diff --git a/application/basilisk/base/content/browser-feeds.js b/application/basilisk/base/content/browser-feeds.js
new file mode 100644
index 000000000..6f29d8915
--- /dev/null
+++ b/application/basilisk/base/content/browser-feeds.js
@@ -0,0 +1,646 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*-
+ * 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/. */
+
+XPCOMUtils.defineLazyModuleGetter(this, "DeferredTask",
+                                  "resource://gre/modules/DeferredTask.jsm");
+
+const TYPE_MAYBE_FEED = "application/vnd.mozilla.maybe.feed";
+const TYPE_MAYBE_AUDIO_FEED = "application/vnd.mozilla.maybe.audio.feed";
+const TYPE_MAYBE_VIDEO_FEED = "application/vnd.mozilla.maybe.video.feed";
+
+const PREF_SHOW_FIRST_RUN_UI = "browser.feeds.showFirstRunUI";
+
+const PREF_SELECTED_APP = "browser.feeds.handlers.application";
+const PREF_SELECTED_WEB = "browser.feeds.handlers.webservice";
+const PREF_SELECTED_ACTION = "browser.feeds.handler";
+const PREF_SELECTED_READER = "browser.feeds.handler.default";
+
+const PREF_VIDEO_SELECTED_APP = "browser.videoFeeds.handlers.application";
+const PREF_VIDEO_SELECTED_WEB = "browser.videoFeeds.handlers.webservice";
+const PREF_VIDEO_SELECTED_ACTION = "browser.videoFeeds.handler";
+const PREF_VIDEO_SELECTED_READER = "browser.videoFeeds.handler.default";
+
+const PREF_AUDIO_SELECTED_APP = "browser.audioFeeds.handlers.application";
+const PREF_AUDIO_SELECTED_WEB = "browser.audioFeeds.handlers.webservice";
+const PREF_AUDIO_SELECTED_ACTION = "browser.audioFeeds.handler";
+const PREF_AUDIO_SELECTED_READER = "browser.audioFeeds.handler.default";
+
+const PREF_UPDATE_DELAY = 2000;
+
+const SETTABLE_PREFS = new Set([
+  PREF_VIDEO_SELECTED_ACTION,
+  PREF_AUDIO_SELECTED_ACTION,
+  PREF_SELECTED_ACTION,
+  PREF_VIDEO_SELECTED_READER,
+  PREF_AUDIO_SELECTED_READER,
+  PREF_SELECTED_READER,
+  PREF_VIDEO_SELECTED_WEB,
+  PREF_AUDIO_SELECTED_WEB,
+  PREF_SELECTED_WEB
+]);
+
+const EXECUTABLE_PREFS = new Set([
+  PREF_SELECTED_APP,
+  PREF_VIDEO_SELECTED_APP,
+  PREF_AUDIO_SELECTED_APP
+]);
+
+const VALID_ACTIONS = new Set(["ask", "reader", "bookmarks"]);
+const VALID_READERS = new Set(["web", "client", "default", "bookmarks"]);
+
+XPCOMUtils.defineLazyPreferenceGetter(this, "SHOULD_LOG",
+                                      "feeds.log", false);
+
+function LOG(str) {
+  if (SHOULD_LOG)
+    dump("*** Feeds: " + str + "\n");
+}
+
+function getPrefActionForType(t) {
+  switch (t) {
+    case Ci.nsIFeed.TYPE_VIDEO:
+      return PREF_VIDEO_SELECTED_ACTION;
+
+    case Ci.nsIFeed.TYPE_AUDIO:
+      return PREF_AUDIO_SELECTED_ACTION;
+
+    default:
+      return PREF_SELECTED_ACTION;
+  }
+}
+
+function getPrefReaderForType(t) {
+  switch (t) {
+    case Ci.nsIFeed.TYPE_VIDEO:
+      return PREF_VIDEO_SELECTED_READER;
+
+    case Ci.nsIFeed.TYPE_AUDIO:
+      return PREF_AUDIO_SELECTED_READER;
+
+    default:
+      return PREF_SELECTED_READER;
+  }
+}
+
+function getPrefWebForType(t) {
+  switch (t) {
+    case Ci.nsIFeed.TYPE_VIDEO:
+      return PREF_VIDEO_SELECTED_WEB;
+
+    case Ci.nsIFeed.TYPE_AUDIO:
+      return PREF_AUDIO_SELECTED_WEB;
+
+    default:
+      return PREF_SELECTED_WEB;
+  }
+}
+
+function getPrefAppForType(t) {
+  switch (t) {
+    case Ci.nsIFeed.TYPE_VIDEO:
+      return PREF_VIDEO_SELECTED_APP;
+
+    case Ci.nsIFeed.TYPE_AUDIO:
+      return PREF_AUDIO_SELECTED_APP;
+
+    default:
+      return PREF_SELECTED_APP;
+  }
+}
+
+/**
+ * Maps a feed type to a maybe-feed mimetype.
+ */
+function getMimeTypeForFeedType(aFeedType) {
+  switch (aFeedType) {
+    case Ci.nsIFeed.TYPE_VIDEO:
+      return TYPE_MAYBE_VIDEO_FEED;
+
+    case Ci.nsIFeed.TYPE_AUDIO:
+      return TYPE_MAYBE_AUDIO_FEED;
+
+    default:
+      return TYPE_MAYBE_FEED;
+  }
+}
+
+/**
+ * The Feed Handler object manages discovery of RSS/ATOM feeds in web pages
+ * and shows UI when they are discovered.
+ */
+var FeedHandler = {
+  _prefChangeCallback: null,
+
+  /** Called when the user clicks on the Subscribe to This Page... menu item,
+   * or when the user clicks the feed button when the page contains multiple
+   * feeds.
+   * Builds a menu of unique feeds associated with the page, and if there
+   * is only one, shows the feed inline in the browser window.
+   * @param   container
+   *          The feed list container (menupopup or subview) to be populated.
+   * @param   isSubview
+   *          Whether we're creating a subview (true) or menu (false/undefined)
+   * @return  true if the menu/subview should be shown, false if there was only
+   *          one feed and the feed should be shown inline in the browser
+   *          window (do not show the menupopup/subview).
+   */
+  buildFeedList(container, isSubview) {
+    let feeds = gBrowser.selectedBrowser.feeds;
+    if (!isSubview && feeds == null) {
+      // XXX hack -- menu opening depends on setting of an "open"
+      // attribute, and the menu refuses to open if that attribute is
+      // set (because it thinks it's already open).  onpopupshowing gets
+      // called after the attribute is unset, and it doesn't get unset
+      // if we return false.  so we unset it here; otherwise, the menu
+      // refuses to work past this point.
+      container.parentNode.removeAttribute("open");
+      return false;
+    }
+
+    for (let i = container.childNodes.length - 1; i >= 0; --i) {
+      let node = container.childNodes[i];
+      if (isSubview && node.localName == "label")
+        continue;
+      container.removeChild(node);
+    }
+
+    if (!feeds || feeds.length <= 1)
+      return false;
+
+    // Build the menu showing the available feed choices for viewing.
+    let itemNodeType = isSubview ? "toolbarbutton" : "menuitem";
+    for (let feedInfo of feeds) {
+      let item = document.createElement(itemNodeType);
+      let baseTitle = feedInfo.title || feedInfo.href;
+      item.setAttribute("label", baseTitle);
+      item.setAttribute("feed", feedInfo.href);
+      item.setAttribute("tooltiptext", feedInfo.href);
+      item.setAttribute("crop", "center");
+      let className = "feed-" + itemNodeType;
+      if (isSubview) {
+        className += " subviewbutton";
+      }
+      item.setAttribute("class", className);
+      container.appendChild(item);
+    }
+    return true;
+  },
+
+  /**
+   * Subscribe to a given feed.  Called when
+   *   1. Page has a single feed and user clicks feed icon in location bar
+   *   2. Page has a single feed and user selects Subscribe menu item
+   *   3. Page has multiple feeds and user selects from feed icon popup (or subview)
+   *   4. Page has multiple feeds and user selects from Subscribe submenu
+   * @param   href
+   *          The feed to subscribe to. May be null, in which case the
+   *          event target's feed attribute is examined.
+   * @param   event
+   *          The event this method is handling. Used to decide where
+   *          to open the preview UI. (Optional, unless href is null)
+   */
+  subscribeToFeed(href, event) {
+    // Just load the feed in the content area to either subscribe or show the
+    // preview UI
+    if (!href)
+      href = event.target.getAttribute("feed");
+    urlSecurityCheck(href, gBrowser.contentPrincipal,
+                     Ci.nsIScriptSecurityManager.DISALLOW_INHERIT_PRINCIPAL);
+    let feedURI = makeURI(href, document.characterSet);
+    // Use the feed scheme so X-Moz-Is-Feed will be set
+    // The value doesn't matter
+    if (/^https?$/.test(feedURI.scheme))
+      href = "feed:" + href;
+    this.loadFeed(href, event);
+  },
+
+  loadFeed(href, event) {
+    let feeds = gBrowser.selectedBrowser.feeds;
+    try {
+      openUILink(href, event, { ignoreAlt: true });
+    }
+    finally {
+      // We might default to a livebookmarks modal dialog,
+      // so reset that if the user happens to click it again
+      gBrowser.selectedBrowser.feeds = feeds;
+    }
+  },
+
+  get _feedMenuitem() {
+    delete this._feedMenuitem;
+    return this._feedMenuitem = document.getElementById("singleFeedMenuitemState");
+  },
+
+  get _feedMenupopup() {
+    delete this._feedMenupopup;
+    return this._feedMenupopup = document.getElementById("multipleFeedsMenuState");
+  },
+
+  /**
+   * Update the browser UI to show whether or not feeds are available when
+   * a page is loaded or the user switches tabs to a page that has feeds.
+   */
+  updateFeeds() {
+    if (this._updateFeedTimeout)
+      clearTimeout(this._updateFeedTimeout);
+
+    let feeds = gBrowser.selectedBrowser.feeds;
+    let haveFeeds = feeds && feeds.length > 0;
+
+    let feedButton = document.getElementById("feed-button");
+    if (feedButton) {
+      if (haveFeeds) {
+        feedButton.removeAttribute("disabled");
+      } else {
+        feedButton.setAttribute("disabled", "true");
+      }
+    }
+
+    if (!haveFeeds) {
+      this._feedMenuitem.setAttribute("disabled", "true");
+      this._feedMenuitem.removeAttribute("hidden");
+      this._feedMenupopup.setAttribute("hidden", "true");
+      return;
+    }
+
+    if (feeds.length > 1) {
+      this._feedMenuitem.setAttribute("hidden", "true");
+      this._feedMenupopup.removeAttribute("hidden");
+    } else {
+      this._feedMenuitem.setAttribute("feed", feeds[0].href);
+      this._feedMenuitem.removeAttribute("disabled");
+      this._feedMenuitem.removeAttribute("hidden");
+      this._feedMenupopup.setAttribute("hidden", "true");
+    }
+  },
+
+  addFeed(link, browserForLink) {
+    if (!browserForLink.feeds)
+      browserForLink.feeds = [];
+
+    browserForLink.feeds.push({ href: link.href, title: link.title });
+
+    // If this addition was for the current browser, update the UI. For
+    // background browsers, we'll update on tab switch.
+    if (browserForLink == gBrowser.selectedBrowser) {
+      // Batch updates to avoid updating the UI for multiple onLinkAdded events
+      // fired within 100ms of each other.
+      if (this._updateFeedTimeout)
+        clearTimeout(this._updateFeedTimeout);
+      this._updateFeedTimeout = setTimeout(this.updateFeeds.bind(this), 100);
+    }
+  },
+
+   /**
+   * Get the human-readable display name of a file. This could be the
+   * application name.
+   * @param   file
+   *          A nsIFile to look up the name of
+   * @return  The display name of the application represented by the file.
+   */
+  _getFileDisplayName(file) {
+    switch (AppConstants.platform) {
+      case "win":
+        if (file instanceof Ci.nsILocalFileWin) {
+          try {
+            return file.getVersionInfoField("FileDescription");
+          } catch (e) {}
+        }
+        break;
+      case "macosx":
+        if (file instanceof Ci.nsILocalFileMac) {
+          try {
+            return file.bundleDisplayName;
+          } catch (e) {}
+        }
+        break;
+    }
+
+    return file.leafName;
+  },
+
+  _chooseClientApp(aTitle, aTypeName, aBrowser) {
+    const prefName = getPrefAppForType(aTypeName);
+    let fp = Cc["@mozilla.org/filepicker;1"].createInstance(Ci.nsIFilePicker);
+
+    fp.init(window, aTitle, Ci.nsIFilePicker.modeOpen);
+    fp.appendFilters(Ci.nsIFilePicker.filterApps);
+
+    fp.open((aResult) => {
+      if (aResult == Ci.nsIFilePicker.returnOK) {
+        let selectedApp = fp.file;
+        if (selectedApp) {
+          // XXXben - we need to compare this with the running instance
+          //          executable just don't know how to do that via script
+          // XXXmano TBD: can probably add this to nsIShellService
+          let appName = "";
+          switch (AppConstants.platform) {
+            case "win":
+              appName = AppConstants.MOZ_APP_NAME + ".exe";
+              break;
+            case "macosx":
+              appName = AppConstants.MOZ_MACBUNDLE_NAME;
+              break;
+            default:
+              appName = AppConstants.MOZ_APP_NAME + "-bin";
+              break;
+          }
+
+          if (fp.file.leafName != appName) {
+            Services.prefs.setComplexValue(prefName, Ci.nsILocalFile, selectedApp);
+            aBrowser.messageManager.sendAsyncMessage("FeedWriter:SetApplicationLauncherMenuItem",
+                                                    { name: this._getFileDisplayName(selectedApp),
+                                                      type: "SelectedAppMenuItem" });
+          }
+        }
+      }
+    });
+
+  },
+
+  executeClientApp(aSpec, aTitle, aSubtitle, aFeedHandler) {
+    // aFeedHandler is either "default", indicating the system default reader, or a pref-name containing
+    // an nsILocalFile pointing to the feed handler's executable.
+
+    let clientApp = null;
+    if (aFeedHandler == "default") {
+      clientApp = Cc["@mozilla.org/browser/shell-service;1"]
+                    .getService(Ci.nsIShellService)
+                    .defaultFeedReader;
+    } else {
+      clientApp = Services.prefs.getComplexValue(aFeedHandler, Ci.nsILocalFile);
+    }
+
+    // For the benefit of applications that might know how to deal with more
+    // URLs than just feeds, send feed: URLs in the following format:
+    //
+    // http urls: replace scheme with feed, e.g.
+    // http://foo.com/index.rdf -> feed://foo.com/index.rdf
+    // other urls: prepend feed: scheme, e.g.
+    // https://foo.com/index.rdf -> feed:https://foo.com/index.rdf
+    let feedURI = NetUtil.newURI(aSpec);
+    if (feedURI.schemeIs("http")) {
+      feedURI.scheme = "feed";
+      aSpec = feedURI.spec;
+    } else {
+      aSpec = "feed:" + aSpec;
+    }
+
+    // Retrieving the shell service might fail on some systems, most
+    // notably systems where GNOME is not installed.
+    try {
+      let ss = Cc["@mozilla.org/browser/shell-service;1"]
+                 .getService(Ci.nsIShellService);
+      ss.openApplicationWithURI(clientApp, aSpec);
+    } catch (e) {
+      // If we couldn't use the shell service, fallback to using a
+      // nsIProcess instance
+      let p = Cc["@mozilla.org/process/util;1"]
+                .createInstance(Ci.nsIProcess);
+      p.init(clientApp);
+      p.run(false, [aSpec], 1);
+    }
+  },
+
+  // nsISupports
+
+  QueryInterface: XPCOMUtils.generateQI([Ci.nsIObserver,
+                                         Ci.nsISupportsWeakReference]),
+
+  init() {
+    window.messageManager.addMessageListener("FeedWriter:ChooseClientApp", this);
+    window.messageManager.addMessageListener("FeedWriter:GetSubscriptionUI", this);
+    window.messageManager.addMessageListener("FeedWriter:SetFeedPrefsAndSubscribe", this);
+    window.messageManager.addMessageListener("FeedWriter:ShownFirstRun", this);
+
+    Services.ppmm.addMessageListener("FeedConverter:ExecuteClientApp", this);
+
+    const prefs = Services.prefs;
+    prefs.addObserver(PREF_SELECTED_ACTION, this, true);
+    prefs.addObserver(PREF_SELECTED_READER, this, true);
+    prefs.addObserver(PREF_SELECTED_WEB, this, true);
+    prefs.addObserver(PREF_VIDEO_SELECTED_ACTION, this, true);
+    prefs.addObserver(PREF_VIDEO_SELECTED_READER, this, true);
+    prefs.addObserver(PREF_VIDEO_SELECTED_WEB, this, true);
+    prefs.addObserver(PREF_AUDIO_SELECTED_ACTION, this, true);
+    prefs.addObserver(PREF_AUDIO_SELECTED_READER, this, true);
+    prefs.addObserver(PREF_AUDIO_SELECTED_WEB, this, true);
+  },
+
+  uninit() {
+    Services.ppmm.removeMessageListener("FeedConverter:ExecuteClientApp", this);
+
+    this._prefChangeCallback = null;
+  },
+
+  // nsIObserver
+  observe(subject, topic, data) {
+    if (topic == "nsPref:changed") {
+      LOG(`Pref changed ${data}`)
+      if (this._prefChangeCallback) {
+        this._prefChangeCallback.disarm();
+      }
+      // Multiple prefs are set at the same time, debounce to reduce noise
+      // This can happen in one feed and we want to message all feed pages
+      this._prefChangeCallback = new DeferredTask(() => {
+        this._prefChanged(data);
+      }, PREF_UPDATE_DELAY);
+      this._prefChangeCallback.arm();
+    }
+  },
+
+  _prefChanged(prefName) {
+    // Don't observe for PREF_*SELECTED_APP as user likely just picked one
+    // That is also handled by SetApplicationLauncherMenuItem call
+    // Rather than the others which happen on subscription
+    switch (prefName) {
+      case PREF_SELECTED_READER:
+      case PREF_SELECTED_WEB:
+      case PREF_VIDEO_SELECTED_READER:
+      case PREF_VIDEO_SELECTED_WEB:
+      case PREF_AUDIO_SELECTED_READER:
+      case PREF_AUDIO_SELECTED_WEB:
+      case PREF_SELECTED_ACTION:
+      case PREF_VIDEO_SELECTED_ACTION:
+      case PREF_AUDIO_SELECTED_ACTION:
+        const response = {
+         default: this._getReaderForType(Ci.nsIFeed.TYPE_FEED),
+         [Ci.nsIFeed.TYPE_AUDIO]: this._getReaderForType(Ci.nsIFeed.TYPE_AUDIO),
+         [Ci.nsIFeed.TYPE_VIDEO]: this._getReaderForType(Ci.nsIFeed.TYPE_VIDEO)
+        };
+        Services.mm.broadcastAsyncMessage("FeedWriter:PreferenceUpdated",
+                                          response);
+        break;
+    }
+  },
+
+  _initSubscriptionUIResponse(feedType) {
+    const wccr = Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
+               getService(Ci.nsIWebContentConverterService);
+    const handlersRaw = wccr.getContentHandlers(getMimeTypeForFeedType(feedType));
+    const handlers = [];
+    for (let handler of handlersRaw) {
+      LOG(`Handler found: ${handler}`);
+      handlers.push({
+        name: handler.name,
+        uri: handler.uri
+      });
+    }
+    let showFirstRunUI = true;
+    // eslint-disable-next-line mozilla/use-default-preference-values
+    try {
+      showFirstRunUI = Services.prefs.getBoolPref(PREF_SHOW_FIRST_RUN_UI);
+    } catch (ex) { }
+    const response = { handlers, showFirstRunUI };
+    let selectedClientApp;
+    const feedTypePref = getPrefAppForType(feedType);
+    try {
+      selectedClientApp = Services.prefs.getComplexValue(feedTypePref, Ci.nsILocalFile);
+    } catch (ex) {
+      // Just do nothing, then we won't bother populating
+    }
+
+    let defaultClientApp = null;
+    try {
+      // This can sometimes not exist
+      defaultClientApp = Cc["@mozilla.org/browser/shell-service;1"]
+                           .getService(Ci.nsIShellService)
+                           .defaultFeedReader;
+    } catch (ex) {
+      // Just do nothing, then we don't bother populating
+    }
+
+    if (selectedClientApp && selectedClientApp.exists()) {
+      if (defaultClientApp && selectedClientApp.path != defaultClientApp.path) {
+        // Only set the default menu item if it differs from the selected one
+        response.defaultMenuItem = this._getFileDisplayName(defaultClientApp);
+      }
+      response.selectedMenuItem = this._getFileDisplayName(selectedClientApp);
+    }
+    response.reader = this._getReaderForType(feedType);
+    return response;
+  },
+
+  _setPref(aPrefName, aPrefValue, aIsComplex = false) {
+    LOG(`FeedWriter._setPref ${aPrefName}`);
+    // Ensure we have a pref that is settable
+    if (aPrefName && SETTABLE_PREFS.has(aPrefName)) {
+      if (aIsComplex) {
+        const supportsString = Cc["@mozilla.org/supports-string;1"].
+                             createInstance(Ci.nsISupportsString);
+        supportsString.data = aPrefValue;
+        Services.prefs.setComplexValue(aPrefName, Ci.nsISupportsString, supportsString);
+      } else {
+        Services.prefs.setCharPref(aPrefName, aPrefValue);
+      }
+    } else {
+      LOG(`FeedWriter._setPref ${aPrefName} not allowed`);
+    }
+  },
+
+  _getReaderForType(feedType) {
+    let prefs = Services.prefs;
+    let handler = "bookmarks";
+    let url;
+    // eslint-disable-next-line mozilla/use-default-preference-values
+    try {
+      handler = prefs.getCharPref(getPrefReaderForType(feedType));
+    } catch (ex) { }
+
+    if (handler === "web") {
+      try {
+        url = prefs.getComplexValue(getPrefWebForType(feedType), Ci.nsISupportsString).data;
+      } catch (ex) {
+        LOG("FeedWriter._setSelectedHandler: invalid or no handler in prefs");
+        url = null;
+      }
+    }
+    const alwaysUse = this._getAlwaysUseState(feedType);
+    const action = prefs.getCharPref(getPrefActionForType(feedType));
+    return { handler, url, alwaysUse, action };
+  },
+
+  _getAlwaysUseState(feedType) {
+    try {
+      return Services.prefs.getCharPref(getPrefActionForType(feedType)) != "ask";
+    } catch (ex) { }
+    return false;
+  },
+
+  receiveMessage(msg) {
+    let handler;
+    switch (msg.name) {
+      case "FeedWriter:GetSubscriptionUI":
+        const response = this._initSubscriptionUIResponse(msg.data.feedType);
+        msg.target.messageManager
+           .sendAsyncMessage("FeedWriter:GetSubscriptionUIResponse",
+                            response);
+        break;
+      case "FeedWriter:ChooseClientApp":
+        this._chooseClientApp(msg.data.title, msg.data.feedType, msg.target);
+        break;
+      case "FeedWriter:ShownFirstRun":
+        Services.prefs.setBoolPref(PREF_SHOW_FIRST_RUN_UI, false);
+        break;
+      case "FeedWriter:SetFeedPrefsAndSubscribe":
+        const settings = msg.data;
+        if (!settings.action || !VALID_ACTIONS.has(settings.action)) {
+          LOG(`Invalid action ${settings.action}`);
+          return;
+        }
+        if (!settings.reader || !VALID_READERS.has(settings.reader)) {
+          LOG(`Invalid reader ${settings.reader}`);
+          return;
+        }
+        const actionPref = getPrefActionForType(settings.feedType);
+        this._setPref(actionPref, settings.action);
+        const readerPref = getPrefReaderForType(settings.feedType);
+        this._setPref(readerPref, settings.reader);
+        handler = null;
+
+        switch (settings.reader) {
+          case "web":
+            // This is a web set URI by content using window.registerContentHandler()
+            // Lets make sure we know about it before setting it
+            const webPref = getPrefWebForType(settings.feedType);
+            let wccr = Cc["@mozilla.org/embeddor.implemented/web-content-handler-registrar;1"].
+                       getService(Ci.nsIWebContentConverterService);
+            // If the user provided an invalid web URL this function won't give us a reference
+            handler = wccr.getWebContentHandlerByURI(getMimeTypeForFeedType(settings.feedType), settings.uri);
+            if (handler) {
+              this._setPref(webPref, settings.uri, true);
+              if (settings.useAsDefault) {
+                wccr.setAutoHandler(getMimeTypeForFeedType(settings.feedType), handler);
+              }
+              msg.target.messageManager
+                 .sendAsyncMessage("FeedWriter:SetFeedPrefsAndSubscribeResponse",
+                                  { redirect: handler.getHandlerURI(settings.feedLocation) });
+            } else {
+              LOG(`No handler found for web ${settings.feedType} ${settings.uri}`);
+            }
+            break;
+          default:
+            const feedService = Cc["@mozilla.org/browser/feeds/result-service;1"].
+                                getService(Ci.nsIFeedResultService);
+
+            feedService.addToClientReader(settings.feedLocation,
+                                          settings.feedTitle,
+                                          settings.feedSubtitle,
+                                          settings.feedType,
+                                          settings.reader);
+        }
+        break;
+      case "FeedConverter:ExecuteClientApp":
+        // Always check feedHandler is from a set array of executable prefs
+        if (EXECUTABLE_PREFS.has(msg.data.feedHandler)) {
+          this.executeClientApp(msg.data.spec, msg.data.title,
+                                msg.data.subtitle, msg.data.feedHandler);
+        } else {
+          LOG(`FeedConverter:ExecuteClientApp - Will not exec ${msg.data.feedHandler}`);
+        }
+        break;
+    }
+  },
+};