diff --git a/devtools/client/locales/en-US/storage.dtd b/devtools/client/locales/en-US/storage.dtd
index 211c794369..adfc031833 100644
--- a/devtools/client/locales/en-US/storage.dtd
+++ b/devtools/client/locales/en-US/storage.dtd
@@ -9,3 +9,6 @@
 
 <!-- LOCALIZATION NOTE : Label of popup menu action to delete all storage items. -->
 <!ENTITY storage.popupMenu.deleteAllLabel "Delete All">
+
+<!-- LOCALIZATION NOTE : Label of popup menu action to delete all session cookies. -->
+<!ENTITY storage.popupMenu.deleteAllSessionCookiesLabel "Delete All Session Cookies">
diff --git a/devtools/client/storage/storage.xul b/devtools/client/storage/storage.xul
index 9fbef51997..85425912c6 100644
--- a/devtools/client/storage/storage.xul
+++ b/devtools/client/storage/storage.xul
@@ -26,6 +26,8 @@
     <menupopup id="storage-tree-popup">
       <menuitem id="storage-tree-popup-delete-all"
                 label="&storage.popupMenu.deleteAllLabel;"/>
+      <menuitem id="storage-tree-popup-delete-all-session-cookies"
+                label="&storage.popupMenu.deleteAllSessionCookiesLabel;"/>
       <menuitem id="storage-tree-popup-delete"/>
     </menupopup>
     <menupopup id="storage-table-popup">
@@ -33,6 +35,8 @@
       <menuitem id="storage-table-popup-delete-all-from"/>
       <menuitem id="storage-table-popup-delete-all"
                 label="&storage.popupMenu.deleteAllLabel;"/>
+      <menuitem id="storage-table-popup-delete-all-session-cookies"
+                label="&storage.popupMenu.deleteAllSessionCookiesLabel;"/>
     </menupopup>
   </popupset>
 
diff --git a/devtools/client/storage/test/browser_storage_basic.js b/devtools/client/storage/test/browser_storage_basic.js
index 72582e32fa..7585eed1fc 100644
--- a/devtools/client/storage/test/browser_storage_basic.js
+++ b/devtools/client/storage/test/browser_storage_basic.js
@@ -29,15 +29,22 @@ const testCases = [
       getCookieId("c1", "test1.example.org", "/browser"),
       getCookieId("cs2", ".example.org", "/"),
       getCookieId("c3", "test1.example.org", "/"),
-      getCookieId("uc1", ".example.org", "/")
+      getCookieId("c4", ".example.org", "/"),
+      getCookieId("uc1", ".example.org", "/"),
+      getCookieId("uc2", ".example.org", "/")
     ]
   ],
   [
     ["cookies", "sectest1.example.org"],
     [
       getCookieId("uc1", ".example.org", "/"),
+      getCookieId("uc2", ".example.org", "/"),
       getCookieId("cs2", ".example.org", "/"),
-      getCookieId("sc1", "sectest1.example.org", "/browser/devtools/client/storage/test/")
+      getCookieId("c4", ".example.org", "/"),
+      getCookieId("sc1", "sectest1.example.org",
+        "/browser/devtools/client/storage/test/"),
+      getCookieId("sc2", "sectest1.example.org",
+        "/browser/devtools/client/storage/test/")
     ]
   ],
   [["localStorage", "http://test1.example.org"],
diff --git a/devtools/client/storage/test/browser_storage_cookies_delete_all.js b/devtools/client/storage/test/browser_storage_cookies_delete_all.js
index ba64014fd4..4640ebecbf 100644
--- a/devtools/client/storage/test/browser_storage_cookies_delete_all.js
+++ b/devtools/client/storage/test/browser_storage_cookies_delete_all.js
@@ -8,11 +8,13 @@
 
 // Test deleting all cookies
 
-function* performDelete(store, rowName, deleteAll) {
+function* performDelete(store, rowName, action) {
   let contextMenu = gPanelWindow.document.getElementById(
     "storage-table-popup");
   let menuDeleteAllItem = contextMenu.querySelector(
     "#storage-table-popup-delete-all");
+  let menuDeleteAllSessionCookiesItem = contextMenu.querySelector(
+    "#storage-table-popup-delete-all-session-cookies");
   let menuDeleteAllFromItem = contextMenu.querySelector(
     "#storage-table-popup-delete-all-from");
 
@@ -25,13 +27,19 @@ function* performDelete(store, rowName, deleteAll) {
 
   yield waitForContextMenu(contextMenu, cells.name, () => {
     info(`Opened context menu in ${storeName}, row '${rowName}'`);
-    if (deleteAll) {
-      menuDeleteAllItem.click();
-    } else {
-      menuDeleteAllFromItem.click();
-      let hostName = cells.host.value;
-      ok(menuDeleteAllFromItem.getAttribute("label").includes(hostName),
+    switch (action) {
+      case "deleteAll":
+        menuDeleteAllItem.click();
+        break;
+      case "deleteAllSessionCookies":
+        menuDeleteAllSessionCookiesItem.click();
+        break;
+      case "deleteAllFrom":
+        menuDeleteAllFromItem.click();
+        let hostName = cells.host.value;
+        ok(menuDeleteAllFromItem.getAttribute("label").includes(hostName),
         `Context menu item label contains '${hostName}'`);
+        break;
     }
   });
 
@@ -48,15 +56,21 @@ add_task(function* () {
         getCookieId("c1", "test1.example.org", "/browser"),
         getCookieId("c3", "test1.example.org", "/"),
         getCookieId("cs2", ".example.org", "/"),
-        getCookieId("uc1", ".example.org", "/")
+        getCookieId("c4", ".example.org", "/"),
+        getCookieId("uc1", ".example.org", "/"),
+        getCookieId("uc2", ".example.org", "/")
       ]
     ],
     [
       ["cookies", "sectest1.example.org"], [
         getCookieId("cs2", ".example.org", "/"),
+        getCookieId("c4", ".example.org", "/"),
         getCookieId("sc1", "sectest1.example.org",
                     "/browser/devtools/client/storage/test/"),
-        getCookieId("uc1", ".example.org", "/")
+        getCookieId("sc2", "sectest1.example.org",
+                    "/browser/devtools/client/storage/test/"),
+        getCookieId("uc1", ".example.org", "/"),
+        getCookieId("uc2", ".example.org", "/")
       ]
     ],
   ]);
@@ -64,6 +78,7 @@ add_task(function* () {
   info("delete all from domain");
   // delete only cookies that match the host exactly
   let id = getCookieId("c1", "test1.example.org", "/browser");
+  yield performDelete(["cookies", "test1.example.org"], id, "deleteAllFrom");
   yield performDelete(["cookies", "test1.example.org"], id, false);
 
   info("test state after delete all from domain");
@@ -73,24 +88,57 @@ add_task(function* () {
       ["cookies", "test1.example.org"],
       [
         getCookieId("cs2", ".example.org", "/"),
-        getCookieId("uc1", ".example.org", "/")
+        getCookieId("c4", ".example.org", "/"),
+        getCookieId("uc1", ".example.org", "/"),
+        getCookieId("uc2", ".example.org", "/")
       ]
     ],
     [
       ["cookies", "sectest1.example.org"],
       [
         getCookieId("cs2", ".example.org", "/"),
+        getCookieId("c4", ".example.org", "/"),
         getCookieId("uc1", ".example.org", "/"),
+        getCookieId("uc2", ".example.org", "/"),
         getCookieId("sc1", "sectest1.example.org",
                     "/browser/devtools/client/storage/test/"),
+        getCookieId("sc2", "sectest1.example.org",
+                    "/browser/devtools/client/storage/test/")
+      ]
+    ],
+  ]);
+
+  info("delete all session cookies");
+  // delete only session cookies
+  id = getCookieId("cs2", ".example.org", "/");
+  yield performDelete(["cookies", "sectest1.example.org"], id,
+    "deleteAllSessionCookies");
+
+  info("test state after delete all session cookies");
+  yield checkState([
+    // Cookies with expiry date must not be deleted.
+    [
+      ["cookies", "test1.example.org"],
+      [
+        getCookieId("c4", ".example.org", "/"),
+        getCookieId("uc2", ".example.org", "/")
+      ]
+    ],
+    [
+      ["cookies", "sectest1.example.org"],
+      [
+        getCookieId("c4", ".example.org", "/"),
+        getCookieId("uc2", ".example.org", "/"),
+        getCookieId("sc2", "sectest1.example.org",
+        "/browser/devtools/client/storage/test/")
       ]
     ],
   ]);
 
   info("delete all");
   // delete all cookies for host, including domain cookies
-  id = getCookieId("uc1", ".example.org", "/");
-  yield performDelete(["cookies", "sectest1.example.org"], id, true);
+  id = getCookieId("uc2", ".example.org", "/");
+  yield performDelete(["cookies", "sectest1.example.org"], id, "deleteAll");
 
   info("test state after delete all");
   yield checkState([
diff --git a/devtools/client/storage/test/browser_storage_delete_tree.js b/devtools/client/storage/test/browser_storage_delete_tree.js
index 0a7a7e6458..2bca4c344d 100644
--- a/devtools/client/storage/test/browser_storage_delete_tree.js
+++ b/devtools/client/storage/test/browser_storage_delete_tree.js
@@ -23,7 +23,9 @@ add_task(function* () {
         getCookieId("c1", "test1.example.org", "/browser"),
         getCookieId("cs2", ".example.org", "/"),
         getCookieId("c3", "test1.example.org", "/"),
-        getCookieId("uc1", ".example.org", "/")
+        getCookieId("c4", ".example.org", "/"),
+        getCookieId("uc1", ".example.org", "/"),
+        getCookieId("uc2", ".example.org", "/")
       ]
     ],
     [["localStorage", "http://test1.example.org"], ["ls1", "ls2"]],
diff --git a/devtools/client/storage/test/storage-listings.html b/devtools/client/storage/test/storage-listings.html
index 89ae5a332c..313b36b718 100644
--- a/devtools/client/storage/test/storage-listings.html
+++ b/devtools/client/storage/test/storage-listings.html
@@ -20,7 +20,10 @@ document.cookie = "c1=foobar; expires=" +
   new Date(cookieExpiresTime1).toGMTString() + "; path=/browser";
 document.cookie = "cs2=sessionCookie; path=/; domain=" + partialHostname;
 document.cookie = "c3=foobar-2; expires=" +
-  new Date(cookieExpiresTime2).toGMTString() + "; path=/";
+  new Date(cookieExpiresTime1).toGMTString() + "; path=/";
+document.cookie = "c4=foobar-3; expires=" +
+  new Date(cookieExpiresTime2).toGMTString() + "; path=/; domain=" +
+  partialHostname;
 // ... and some local storage items ..
 localStorage.setItem("ls1", "foobar");
 localStorage.setItem("ls2", "foobar-2");
diff --git a/devtools/client/storage/test/storage-secured-iframe.html b/devtools/client/storage/test/storage-secured-iframe.html
index 8424fd4cdf..9e1ef60a0d 100644
--- a/devtools/client/storage/test/storage-secured-iframe.html
+++ b/devtools/client/storage/test/storage-secured-iframe.html
@@ -1,4 +1,4 @@
-<!DOCTYPE HTML>
+<!DOCTYPE HTML>
 <html>
 <!--
 Iframe for testing multiple host detetion in storage actor
@@ -9,7 +9,10 @@ Iframe for testing multiple host detetion in storage actor
 <body>
 <script type="application/javascript;version=1.7">
 "use strict";
+let cookieExpiresTime = 2000000000000;
 document.cookie = "sc1=foobar;";
+document.cookie = "sc2=foobar-2; expires=" +
+  new Date(cookieExpiresTime).toGMTString() + ";";
 localStorage.setItem("iframe-s-ls1", "foobar");
 sessionStorage.setItem("iframe-s-ss1", "foobar-2");
 dump("added cookies and storage from secured iframe\n");
diff --git a/devtools/client/storage/test/storage-unsecured-iframe.html b/devtools/client/storage/test/storage-unsecured-iframe.html
index a69ffdfd1f..cd08a61644 100644
--- a/devtools/client/storage/test/storage-unsecured-iframe.html
+++ b/devtools/client/storage/test/storage-unsecured-iframe.html
@@ -9,7 +9,10 @@ Iframe for testing multiple host detetion in storage actor
 <body>
 <script>
 "use strict";
+let cookieExpiresTime = 2000000000000;
 document.cookie = "uc1=foobar; domain=.example.org; path=/";
+document.cookie = "uc2=foobar-2; expires=" +
+  new Date(cookieExpiresTime).toGMTString() + "; path=/; domain=.example.org";
 localStorage.setItem("iframe-u-ls1", "foobar");
 sessionStorage.setItem("iframe-u-ss1", "foobar1");
 sessionStorage.setItem("iframe-u-ss2", "foobar2");
diff --git a/devtools/client/storage/ui.js b/devtools/client/storage/ui.js
index 946db68a26..af0bfa375d 100644
--- a/devtools/client/storage/ui.js
+++ b/devtools/client/storage/ui.js
@@ -163,6 +163,7 @@ function StorageUI(front, target, panelWin, toolbox) {
   this.onRemoveItem = this.onRemoveItem.bind(this);
   this.onRemoveAllFrom = this.onRemoveAllFrom.bind(this);
   this.onRemoveAll = this.onRemoveAll.bind(this);
+  this.onRemoveAllSessionCookies = this.onRemoveAllSessionCookies.bind(this);
   this.onRemoveTreeItem = this.onRemoveTreeItem.bind(this);
 
   this._tablePopupDelete = this._panelDoc.getElementById(
@@ -178,10 +179,20 @@ function StorageUI(front, target, panelWin, toolbox) {
     "storage-table-popup-delete-all");
   this._tablePopupDeleteAll.addEventListener("command", this.onRemoveAll);
 
+  this._tablePopupDeleteAllSessionCookies = this._panelDoc.getElementById(
+    "storage-table-popup-delete-all-session-cookies");
+  this._tablePopupDeleteAllSessionCookies.addEventListener("command",
+    this.onRemoveAllSessionCookies);
+
   this._treePopupDeleteAll = this._panelDoc.getElementById(
     "storage-tree-popup-delete-all");
   this._treePopupDeleteAll.addEventListener("command", this.onRemoveAll);
 
+  this._treePopupDeleteAllSessionCookies = this._panelDoc.getElementById(
+    "storage-tree-popup-delete-all-session-cookies");
+  this._treePopupDeleteAllSessionCookies.addEventListener("command",
+    this.onRemoveAllSessionCookies);
+
   this._treePopupDelete = this._panelDoc.getElementById("storage-tree-popup-delete");
   this._treePopupDelete.addEventListener("command", this.onRemoveTreeItem);
 }
@@ -211,12 +222,16 @@ StorageUI.prototype = {
 
     this._treePopup.removeEventListener("popupshowing", this.onTreePopupShowing);
     this._treePopupDeleteAll.removeEventListener("command", this.onRemoveAll);
+    this._treePopupDeleteAllSessionCookies.removeEventListener("command",
+      this.onRemoveAllSessionCookies);
     this._treePopupDelete.removeEventListener("command", this.onRemoveTreeItem);
 
     this._tablePopup.removeEventListener("popupshowing", this.onTablePopupShowing);
     this._tablePopupDelete.removeEventListener("command", this.onRemoveItem);
     this._tablePopupDeleteAllFrom.removeEventListener("command", this.onRemoveAllFrom);
     this._tablePopupDeleteAll.removeEventListener("command", this.onRemoveAll);
+    this._tablePopupDeleteAllSessionCookies.removeEventListener("command",
+      this.onRemoveAllSessionCookies);
   },
 
   /**
@@ -453,22 +468,24 @@ StorageUI.prototype = {
    * @param {object} See onUpdate docs
    */
   handleChangedItems: function (changed) {
-    let [type, host, db, objectStore] = this.tree.selectedItem;
-    if (!changed[type] || !changed[type][host] ||
-        changed[type][host].length == 0) {
-      return;
-    }
-    try {
-      let toUpdate = [];
-      for (let name of changed[type][host]) {
-        let names = JSON.parse(name);
-        if (names[0] == db && names[1] == objectStore && names[2]) {
-          toUpdate.push(name);
-        }
+    if (this.tree.selectedItem) {
+      let [type, host, db, objectStore] = this.tree.selectedItem;
+      if (!changed[type] || !changed[type][host] ||
+          changed[type][host].length == 0) {
+        return;
+      }
+      try {
+        let toUpdate = [];
+        for (let name of changed[type][host]) {
+          let names = JSON.parse(name);
+          if (names[0] == db && names[1] == objectStore && names[2]) {
+            toUpdate.push(name);
+          }
+        }
+        this.fetchStorageObjects(type, host, toUpdate, REASON.UPDATE);
+      } catch (ex) {
+        this.fetchStorageObjects(type, host, changed[type][host], REASON.UPDATE);
       }
-      this.fetchStorageObjects(type, host, toUpdate, REASON.UPDATE);
-    } catch (ex) {
-      this.fetchStorageObjects(type, host, changed[type][host], REASON.UPDATE);
     }
   },
 
@@ -957,6 +974,15 @@ StorageUI.prototype = {
     this._tablePopupDelete.setAttribute("label",
       L10N.getFormatStr("storage.popupMenu.deleteLabel", label));
 
+    let showDeleteAllSessionCookies = false;
+    if (selectedItem && actor.removeAllSessionCookies) {
+      if (type === "cookies" && selectedItem.length === 2) {
+        showDeleteAllSessionCookies = true;
+      }
+    }
+
+    this._tablePopupDeleteAllSessionCookies.hidden = !showDeleteAllSessionCookies;
+
     if (type === "cookies") {
       let host = addEllipsis(data.host);
 
@@ -997,6 +1023,17 @@ StorageUI.prototype = {
 
       this._treePopupDeleteAll.hidden = !showDeleteAll;
 
+      // The delete all session cookies action is displayed for cookie object stores
+      // (level 2 of tree)
+      let showDeleteAllSessionCookies = false;
+      if (actor.removeAllSessionCookies) {
+        if (type === "cookies" && selectedItem.length === 2) {
+          showDeleteAllSessionCookies = true;
+        }
+      }
+
+      this._treePopupDeleteAllSessionCookies.hidden = !showDeleteAllSessionCookies;
+
       // The delete action is displayed for:
       // - IndexedDB databases (level 3 of the tree)
       // - Cache objects (level 3 of the tree)
@@ -1037,14 +1074,27 @@ StorageUI.prototype = {
    */
   onRemoveAll: function () {
     // Cannot use this.currentActor() if the handler is called from the
-    // tree context menu: it returns correct value only after the table
-    // data from server are successfully fetched (and that's async).
+    // tree context menu: it returns the correct value only after the
+    // table data from server are successfully fetched (and that's async).
     let [type, host, ...path] = this.tree.selectedItem;
     let actor = this.storageTypes[type];
     let name = path.length > 0 ? JSON.stringify(path) : undefined;
     actor.removeAll(host, name);
   },
 
+  /**
+   * Handles removing all session cookies from the storage
+   */
+  onRemoveAllSessionCookies: function () {
+    // Cannot use this.currentActor() if the handler is called from the
+    // tree context menu: it returns the correct value only after the
+    // table data from server is successfully fetched (and that's async).
+    let [, host, ...path] = this.tree.selectedItem;
+    let actor = this.getCurrentActor();
+    let name = path.length > 0 ? JSON.stringify(path) : undefined;
+    actor.removeAllSessionCookies(host, name);
+  },
+
   /**
    * Handles removing all cookies with exactly the same domain as the
    * cookie in the selected row.
diff --git a/devtools/server/actors/storage.js b/devtools/server/actors/storage.js
index 6d069939de..6d1e2dc99a 100644
--- a/devtools/server/actors/storage.js
+++ b/devtools/server/actors/storage.js
@@ -628,6 +628,12 @@ StorageActors.createActor({
                                            .originAttributes);
   }),
 
+  removeAllSessionCookies: Task.async(function* (host, domain) {
+    let doc = this.storageActor.document;
+    this.removeAllSessionCookies(host, domain, doc.nodePrincipal
+                                                  .originAttributes);
+  }),
+
   maybeSetupChildProcess() {
     cookieHelpers.onCookieChanged = this.onCookieChanged.bind(this);
 
@@ -644,6 +650,8 @@ StorageActors.createActor({
         cookieHelpers.removeCookie.bind(cookieHelpers);
       this.removeAllCookies =
         cookieHelpers.removeAllCookies.bind(cookieHelpers);
+      this.removeAllSessionCookies =
+        cookieHelpers.removeAllSessionCookies.bind(cookieHelpers);
       return;
     }
 
@@ -667,6 +675,8 @@ StorageActors.createActor({
       callParentProcess.bind(null, "removeCookie");
     this.removeAllCookies =
       callParentProcess.bind(null, "removeAllCookies");
+    this.removeAllSessionCookies =
+      callParentProcess.bind(null, "removeAllSessionCookies");
 
     addMessageListener("debug:storage-cookie-request-child",
                        cookieHelpers.handleParentRequest);
@@ -853,7 +863,8 @@ var cookieHelpers = {
       if (hostMatches(cookie.host, host) &&
           (!opts.name || cookie.name === opts.name) &&
           (!opts.domain || cookie.host === opts.domain) &&
-          (!opts.path || cookie.path === opts.path)) {
+          (!opts.path || cookie.path === opts.path) &&
+          (!opts.session || (!cookie.expires && !cookie.maxAge))) {
         Services.cookies.remove(
           cookie.host,
           cookie.name,
@@ -875,6 +886,10 @@ var cookieHelpers = {
     this._removeCookies(host, { domain, originAttributes });
   },
 
+  removeAllSessionCookies(host, domain, originAttributes) {
+    this._removeCookies(host, { domain, originAttributes, session: true });
+  },
+
   addCookieObservers() {
     Services.obs.addObserver(cookieHelpers, "cookie-changed", false);
     return null;
@@ -951,6 +966,12 @@ var cookieHelpers = {
         let originAttributes = msg.data.args[2];
         return cookieHelpers.removeAllCookies(host, domain, originAttributes);
       }
+      case "removeAllSessionCookies": {
+        let host = msg.data.args[0];
+        let domain = msg.data.args[1];
+        let originAttributes = msg.data.args[2];
+        return cookieHelpers.removeAllSessionCookies(host, domain, originAttributes);
+      }
       default:
         console.error("ERR_DIRECTOR_PARENT_UNKNOWN_METHOD", msg.json.method);
         throw new Error("ERR_DIRECTOR_PARENT_UNKNOWN_METHOD");
diff --git a/devtools/shared/specs/storage.js b/devtools/shared/specs/storage.js
index 77f90323f2..be56678b7a 100644
--- a/devtools/shared/specs/storage.js
+++ b/devtools/shared/specs/storage.js
@@ -97,6 +97,14 @@ createStorageSpec({
         },
         response: {}
       }
+    }, {
+      removeAllSessionCookies: {
+        request: {
+          host: Arg(0, "string"),
+          domain: Arg(1, "nullable:string")
+        },
+        response: {}
+      }
     }
   )
 });