--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -783,17 +783,17 @@ function gKeywordURIFixup({ target: brow
   };
 
   gDNSService.asyncResolve(hostName, 0, onLookupComplete, Services.tm.mainThread);
 }
 
 // Called when a docshell has attempted to load a page in an incorrect process.
 // This function is responsible for loading the page in the correct process.
 function RedirectLoad({ target: browser, data }) {
-  let tab = gBrowser._getTabForBrowser(browser);
+  let tab = gBrowser.getTabForBrowser(browser);
   // Flush the tab state before getting it
   TabState.flush(browser);
   let tabState = JSON.parse(SessionStore.getTabState(tab));
 
   if (data.historyIndex < 0) {
     // Add a pseudo-history state for the new url to load
     let newEntry = {
       url: data.uri,

--- a/browser/base/content/tabbrowser.xml
+++ b/browser/base/content/tabbrowser.xml
@@ -384,17 +384,17 @@
           // When not using remote browsers, we can take a fast path by getting
           // directly from the content window to the browser without looping
           // over all browsers.
           if (!gMultiProcessBrowser) {
             let browser = aWindow.QueryInterface(Ci.nsIInterfaceRequestor)
                                  .getInterface(Ci.nsIWebNavigation)
                                  .QueryInterface(Ci.nsIDocShell)
                                  .chromeEventHandler;
-            return this._getTabForBrowser(browser);
+            return this.getTabForBrowser(browser);
           }
 
           for (let i = 0; i < this.browsers.length; i++) {
             // NB: We use contentWindowAsCPOW so that this code works both
             // for remote browsers as well. aWindow may be a CPOW.
             if (this.browsers[i].contentWindowAsCPOW == aWindow)
               return this.tabs[i];
           }

--- a/browser/extensions/pdfjs/content/PdfStreamConverter.jsm
+++ b/browser/extensions/pdfjs/content/PdfStreamConverter.jsm
@@ -72,17 +72,17 @@ function getChromeWindow(domWindow) {
 
 function getFindBar(domWindow) {
   if (PdfjsContentUtils.isRemote) {
     return PdfjsContentUtils.getFindBar(domWindow);
   }
   var browser = getContainingBrowser(domWindow);
   try {
     var tabbrowser = browser.getTabBrowser();
-    var tab = tabbrowser._getTabForBrowser(browser);
+    var tab = tabbrowser.getTabForBrowser(browser);
     return tabbrowser.getFindBar(tab);
   } catch (e) {
     // FF22 has no _getTabForBrowser, and FF24 has no getFindBar
     var chromeWindow = browser.ownerDocument.defaultView;
     return chromeWindow.gFindBar;
   }
 }
 

--- a/browser/extensions/pdfjs/content/PdfjsChromeUtils.jsm
+++ b/browser/extensions/pdfjs/content/PdfjsChromeUtils.jsm
@@ -280,17 +280,17 @@ let PdfjsChromeUtils = {
 /*
  * CPOW security features require chrome objects declare exposed
  * properties via __exposedProps__. We don't want to expose things
  * directly on the findbar, so we wrap the findbar in a smaller
  * object here that supports the features pdf.js needs.
  */
 function PdfjsFindbarWrapper(aBrowser) {
   let tabbrowser = aBrowser.getTabBrowser();
-  let tab = tabbrowser._getTabForBrowser(aBrowser);
+  let tab = tabbrowser.getTabForBrowser(aBrowser);
   this._findbar = tabbrowser.getFindBar(tab);
 };
 
 PdfjsFindbarWrapper.prototype = {
   __exposedProps__: {
     addEventListener: "r",
     removeEventListener: "r",
     updateControlState: "r",

--- a/browser/modules/webrtcUI.jsm
+++ b/browser/modules/webrtcUI.jsm
@@ -60,17 +60,17 @@ this.webrtcUI = {
              aScreen && state.screen;
     }).map(aStream => {
       let state = aStream.state;
       let types = {camera: state.camera, microphone: state.microphone,
                    screen: state.screen};
       let browser = aStream.browser;
       let browserWindow = browser.ownerDocument.defaultView;
       let tab = browserWindow.gBrowser &&
-                browserWindow.gBrowser._getTabForBrowser(browser);
+                browserWindow.gBrowser.getTabForBrowser(browser);
       return {uri: state.documentURI, tab: tab, browser: browser, types: types};
     });
   },
 
   showSharingDoorhanger: function(aActiveStream, aType) {
     let browserWindow = aActiveStream.browser.ownerDocument.defaultView;
     if (aActiveStream.tab) {
       browserWindow.gBrowser.selectedTab = aActiveStream.tab;

--- a/services/fxaccounts/FxAccountsOAuthClient.jsm
+++ b/services/fxaccounts/FxAccountsOAuthClient.jsm
@@ -180,17 +180,17 @@ this.FxAccountsOAuthClient.prototype = {
             this.tearDown();
 
             // if the message asked to close the tab
             if (data.closeWindow && target) {
               // for e10s reasons the best way is to use the TabBrowser to close the tab.
               let tabbrowser = target.getTabBrowser();
 
               if (tabbrowser) {
-                let tab = tabbrowser._getTabForBrowser(target);
+                let tab = tabbrowser.getTabForBrowser(target);
 
                 if (tab) {
                   tabbrowser.removeTab(tab);
                   log.debug("OAuth flow closed the tab.");
                 } else {
                   log.debug("OAuth flow failed to close the tab. Tab not found in TabBrowser.");
                 }
               } else {