diff --git a/suite/common/contentAreaContextOverlay.xul b/suite/common/contentAreaContextOverlay.xul
index ca0bb81e0c..941a7d733e 100644
--- a/suite/common/contentAreaContextOverlay.xul
+++ b/suite/common/contentAreaContextOverlay.xul
@@ -27,7 +27,7 @@
      -->
     <menupopup id="contentAreaContextMenu"
                pagemenu="start"
-               onpopupshowing="if (event.target != this) return true; gContextMenu = new nsContextMenu(this, null, event.shiftKey); return gContextMenu.shouldDisplay;"
+               onpopupshowing="if (event.target != this) return true; gContextMenu = new nsContextMenu(this, event.shiftKey, event); return gContextMenu.shouldDisplay;"
                onpopuphiding="if (event.target != this) return; gContextMenu.hiding(); gContextMenu = null;">
       <menuseparator id="page-menu-separator"/>
       <menuitem id="popupwindow-reject"
diff --git a/suite/common/nsContextMenu.js b/suite/common/nsContextMenu.js
index 70ced6a512..23e655abfd 100644
--- a/suite/common/nsContextMenu.js
+++ b/suite/common/nsContextMenu.js
@@ -15,20 +15,22 @@
 
 Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");
 
+var gContextMenuContentData = null;
+
 XPCOMUtils.defineLazyGetter(this, "PageMenuParent", function() {
   let tmp = {};
   Components.utils.import("resource://gre/modules/PageMenu.jsm", tmp);
   return new tmp.PageMenuParent();
 });
 
-function nsContextMenu(aXulMenu, aBrowser, aIsShift) {
+function nsContextMenu(aXulMenu, aIsShift, aEvent) {
   this.shouldDisplay = true;
-  this.initMenu(aBrowser, aXulMenu, aIsShift);
+  this.initMenu(aXulMenu, aIsShift, aEvent);
 }
 
 // Prototype for nsContextMenu "class."
 nsContextMenu.prototype = {
-  initMenu: function(aBrowser, aXulMenu, aIsShift) {
+  initMenu: function(aXulMenu, aIsShift, aEvent) {
     // Get contextual info.
     this.setTarget(document.popupNode, document.popupRangeParent,
                    document.popupRangeOffset);
@@ -48,9 +50,61 @@ nsContextMenu.prototype = {
 
     // Initialize (disable/remove) menu items.
     this.initItems();
+    // Initialize gContextMenuContentData.
+    if (aEvent)
+      this.initContentData(aEvent);
+  },
+
+  initContentData: function(aEvent) {
+    var addonInfo = {};
+    var subject = {
+      event: aEvent,
+      addonInfo: addonInfo,
+    };
+    subject.wrappedJSObject = subject;
+    // Notifies the Addon-SDK which then populates addonInfo.
+    Services.obs.notifyObservers(subject, "content-contextmenu", null);
+  
+    var popupNode = this.target;
+    var doc = popupNode.ownerDocument;
+
+    var contentType = null;
+    var contentDisposition = null;
+    if (this.onImage) {
+      try {
+        let imageCache = Components.classes["@mozilla.org/image/tools;1"]
+                                   .getService(Components.interfaces.imgITools)
+                                   .getImgCacheForDocument(doc)
+        let props = imageCache.findEntryProperties(popupNode.currentURI);
+        if (props) {
+          let nsISupportsCString = Components.interfaces.nsISupportsCString;
+          contentType = props.get("type", nsISupportsCString).data;
+          contentDisposition = props.get("content-disposition",
+                                         nsISupportsCString).data;
+        }
+      } catch (e) {
+        Components.utils.reportError(e);
+      }
+    }
+
+    gContextMenuContentData = {
+      isRemote: false,
+      event: aEvent,
+      popupNode: popupNode,
+      browser: this.browser,
+      addonInfo: addonInfo,
+      documentURIObject: doc.documentURIObject,
+      docLocation: doc.location.href,
+      charSet: doc.characterSet,
+      referrer: doc.referrer,
+      referrerPolicy: doc.referrerPolicy,
+      contentType: contentType,
+      contentDisposition: contentDisposition,
+    };
   },
 
   hiding: function () {
+    gContextMenuContentData = null;
     InlineSpellCheckerUI.clearSuggestionsFromMenu();
     InlineSpellCheckerUI.clearDictionaryListFromMenu();
     InlineSpellCheckerUI.uninit();