--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -2279,43 +2279,16 @@ function BrowserOpenTab(event) {
         where = "tab";
         break;
     }
   }
 
   openUILinkIn(BROWSER_NEW_TAB_URL, where, { relatedToCurrent });
 }
 
-/* Called from the openLocation dialog. This allows that dialog to instruct
-   its opener to open a new window and then step completely out of the way.
-   Anything less byzantine is causing horrible crashes, rather believably,
-   though oddly only on Linux. */
-function delayedOpenWindow(chrome, flags, href, postData) {
-  // The other way to use setTimeout,
-  // setTimeout(openDialog, 10, chrome, "_blank", flags, url),
-  // doesn't work here.  The extra "magic" extra argument setTimeout adds to
-  // the callback function would confuse gBrowserInit.onLoad() by making
-  // window.arguments[1] be an integer instead of null.
-  setTimeout(function() { openDialog(chrome, "_blank", flags, href, null, null, postData); }, 10);
-}
-
-/* Required because the tab needs time to set up its content viewers and get the load of
-   the URI kicked off before becoming the active content area. */
-function delayedOpenTab(aUrl, aReferrer, aCharset, aPostData, aAllowThirdPartyFixup) {
-  gBrowser.loadOneTab(aUrl, {
-    referrerURI: aReferrer,
-    charset: aCharset,
-    postData: aPostData,
-    inBackground: false,
-    allowThirdPartyFixup: aAllowThirdPartyFixup,
-    // Bug 1367168: only use systemPrincipal till we can remove that function
-    triggeringPrincipal: Services.scriptSecurityManager.getSystemPrincipal(),
-  });
-}
-
 var gLastOpenDirectory = {
   _lastDir: null,
   get path() {
     if (!this._lastDir || !this._lastDir.exists()) {
       try {
         this._lastDir = gPrefService.getComplexValue("browser.open.lastDir",
                                                      Ci.nsIFile);
         if (!this._lastDir.exists())
@@ -3521,25 +3494,16 @@ var PrintPreviewListener = {
       SidebarUI.show(this._sidebarCommand);
   },
 
   activateBrowser(browser) {
     gBrowser.activateBrowserForPrintPreview(browser);
   },
 };
 
-function getMarkupDocumentViewer() {
-  return gBrowser.markupDocumentViewer;
-}
-
-// This function is obsolete. Newer code should use <tooltip page="true"/> instead.
-function FillInHTMLTooltip(tipElement) {
-  document.getElementById("aHTMLTooltip").fillInPageTooltip(tipElement);
-}
-
 var browserDragAndDrop = {
   canDropLink: aEvent => Services.droppedLinkHandler.canDropLink(aEvent, true),
 
   dragOver(aEvent) {
     if (this.canDropLink(aEvent)) {
       aEvent.preventDefault();
     }
   },
@@ -6316,30 +6280,16 @@ var gPageStyleMenu = {
   },
 
   disableStyle() {
     let mm = gBrowser.selectedBrowser.messageManager;
     mm.sendAsyncMessage("PageStyle:Disable");
   },
 };
 
-/* Legacy global page-style functions */
-var stylesheetFillPopup = gPageStyleMenu.fillPopup.bind(gPageStyleMenu);
-function stylesheetSwitchAll(contentWindow, title) {
-  // We ignore the contentWindow param. Add-ons don't appear to use
-  // it, and it's difficult to support in e10s (where it will be a
-  // CPOW).
-  gPageStyleMenu.switchStyleSheet(title);
-}
-function setStyleDisabled(disabled) {
-  if (disabled)
-    gPageStyleMenu.disableStyle();
-}
-
-
 var LanguageDetectionListener = {
   init() {
     window.messageManager.addMessageListener("Translation:DocumentState", msg => {
       Translation.documentStateReceived(msg.target, msg.data);
     });
   }
 };