--- a/mobile/android/chrome/content/SelectionHandler.js
+++ b/mobile/android/chrome/content/SelectionHandler.js
@@ -391,16 +391,25 @@ var SelectionHandler = {
       sendMessageToJava({
         type: "Share:Text",
         text: selectedText
       });
     }
     this._closeSelection();
   },
 
+  searchSelection: function sh_searchSelection() {
+    let selectedText = this._getSelectedText();
+    if (selectedText.length) {
+      let req = Services.search.defaultEngine.getSubmission(selectedText);
+      BrowserApp.selectOrOpenTab(req.uri.spec);
+    }
+    this._closeSelection();
+  },
+
   /*
    * Called if for any reason we fail during the selection
    * process. Cancels the selection.
    */
   _onFail: function sh_onFail(aDbgMessage) {
     if (aDbgMessage && aDbgMessage.length > 0)
       Cu.reportError("SelectionHandler - " + aDbgMessage);
     this._closeSelection();

--- a/mobile/android/chrome/content/browser.js
+++ b/mobile/android/chrome/content/browser.js
@@ -2060,16 +2060,18 @@ var NativeWindow = {
         return;
 
       // store a weakref to the target to be used when the context menu event returns
       this._target = target;
 
       this.menuitems = [];
       let menuitemsSet = false;
 
+      Services.obs.notifyObservers(null, "before-build-contextmenu", "");
+
       // now walk up the tree and for each node look for any context menu items that apply
       let element = target;
       this._nativeItemsSeparator = 0;
       while (element) {
         // first check for any html5 context menus that might exist
         let contextmenu = element.contextMenu;
         if (contextmenu) {
           // send this before we build the list to make sure the site can update the menu
@@ -5957,24 +5959,47 @@ var IndexedDB = {
     // Set the timeoutId after the popup has been created, and use the long
     // timeout value. If the user doesn't notice the popup after this amount of
     // time then it is most likely not visible and we want to alert the page.
     timeoutId = setTimeout(timeoutNotification, firstTimeoutDuration);
   }
 };
 
 var ClipboardHelper = {
+  // Recorded so search with option can be removed/replaced when default engine changed.
+  _searchMenuItem: -1,
+
   init: function() {
     NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.copy"), ClipboardHelper.getCopyContext(false), ClipboardHelper.copy.bind(ClipboardHelper));
     NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.copyAll"), ClipboardHelper.getCopyContext(true), ClipboardHelper.copy.bind(ClipboardHelper));
     NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.selectWord"), ClipboardHelper.selectWordContext, ClipboardHelper.selectWord.bind(ClipboardHelper));
     NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.selectAll"), ClipboardHelper.selectAllContext, ClipboardHelper.selectAll.bind(ClipboardHelper));
     NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.share"), ClipboardHelper.shareContext, ClipboardHelper.share.bind(ClipboardHelper));
     NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.paste"), ClipboardHelper.pasteContext, ClipboardHelper.paste.bind(ClipboardHelper));
     NativeWindow.contextmenus.add(Strings.browser.GetStringFromName("contextmenu.changeInputMethod"), NativeWindow.contextmenus.textContext, ClipboardHelper.inputMethod.bind(ClipboardHelper));
+
+    // We add this contextmenu item right before the menu is built to avoid having to initialise the search service early.
+    Services.obs.addObserver(this, "before-build-contextmenu", false);
+  },
+
+  uninit: function ch_uninit() {
+    Services.obs.removeObserver(this, "before-build-contextmenu");
+  },
+
+  observe: function observe(aSubject, aTopic) {
+    if (aTopic == "ContextMenu:Open") {
+      this._setSearchMenuItem();
+    }
+  },
+
+  _setSearchMenuItem: function setSearchMenuItem() {
+    if (this._searchMenuItem) {
+      NativeWindow.contextmenus.remove(this._searchMenuItem);
+    }
+    this._searchMenuItem = NativeWindow.contextmenus.add(Strings.browser.formatStringFromName("contextmenu.search", [Services.search.defaultEngine.name], 1), ClipboardHelper.searchWithContext, ClipboardHelper.searchWith.bind(ClipboardHelper));
   },
 
   get clipboardHelper() {
     delete this.clipboardHelper;
     return this.clipboardHelper = Cc["@mozilla.org/widget/clipboardhelper;1"].getService(Ci.nsIClipboardHelper);
   },
 
   get clipboard() {
@@ -6001,16 +6026,20 @@ var ClipboardHelper = {
   selectWord: function(aElement, aX, aY) {
     SelectionHandler.startSelection(aElement, aX, aY);
   },
 
   selectAll: function(aElement, aX, aY) {
     SelectionHandler.selectAll(aElement, aX, aY);
   },
 
+  searchWith: function(aElement) {
+    SelectionHandler.searchSelection(aElement);
+  },
+
   share: function() {
     SelectionHandler.shareSelection();
   },
 
   paste: function(aElement) {
     if (!aElement || !(aElement instanceof Ci.nsIDOMNSEditableElement))
       return;
     let target = aElement.QueryInterface(Ci.nsIDOMNSEditableElement);
@@ -6070,16 +6099,22 @@ var ClipboardHelper = {
   },
 
   shareContext: {
     matches: function shareContextMatches(aElement, aX, aY) {
       return SelectionHandler.shouldShowContextMenu(aX, aY);
     }
   },
 
+  searchWithContext: {
+    matches: function searchWithContextMatches(aElement, aX, aY) {
+      return SelectionHandler.shouldShowContextMenu(aX, aY);
+    }
+  },
+
   pasteContext: {
     matches: function(aElement) {
       if (NativeWindow.contextmenus.textContext.matches(aElement)) {
         let flavors = ["text/unicode"];
         return ClipboardHelper.clipboard.hasDataMatchingFlavors(flavors, flavors.length, Ci.nsIClipboard.kGlobalClipboard);
       }
       return false;
     }

--- a/mobile/android/locales/en-US/chrome/browser.properties
+++ b/mobile/android/locales/en-US/chrome/browser.properties
@@ -160,16 +160,17 @@ contextmenu.bookmarkLink=Bookmark Link
 contextmenu.copyEmailAddress=Copy Email Address
 contextmenu.shareEmailAddress=Share Email Address
 contextmenu.copyPhoneNumber=Copy Phone Number
 contextmenu.sharePhoneNumber=Share Phone Number
 contextmenu.changeInputMethod=Select Input Method
 contextmenu.fullScreen=Full Screen
 contextmenu.copyImageLocation=Copy Image Location
 contextmenu.shareImage=Share Image
+contextmenu.search=%S Search
 contextmenu.saveImage=Save Image
 contextmenu.setWallpaper=Set as Wallpaper
 contextmenu.addSearchEngine=Add Search Engine
 contextmenu.playMedia=Play
 contextmenu.pauseMedia=Pause
 contextmenu.shareMedia=Share Video
 contextmenu.showControls2=Show Controls
 contextmenu.mute=Mute