OlgaTPark/tenfourfox#14 — M1520960 M1660998 - Allow saving passwords in private windows with a dismissed-by-default doorhanger and fix preferences accordingly (#637)

Testcases aren't included because they require async/await.

References:
https://bugzilla.mozilla.org/show_bug.cgi?id=1520960 (Allow saving passwords in private windows with a dismissed-by-default doorhanger)
https://hg.mozilla.org/mozilla-central/rev/b4645dc802f9 (Allow login capture from form submissions in private browsing when pref'd on.)
https://hg.mozilla.org/mozilla-central/rev/5656f8b5c547 (Allow login capture from HTTP auth prompts in private browsing when pref'd on.)
https://bugzilla.mozilla.org/show_bug.cgi?id=1660998 (Option to save logins does not keep state in private mode)
https://hg.mozilla.org/mozilla-central/rev/d67d3463b4aa (Don't disable the password manager checkbox in permanent private browsing mode.)

browser/app/profile/firefox.js

@@ -1622,6 +1622,8 @@ pref("browser.pocket.oAuthConsumerKey", "40249-e88c401e1b1f2242d9e441c4");
 pref("browser.pocket.useLocaleList", true);
 pref("browser.pocket.enabledLocales", "cs de en-GB en-US en-ZA es-ES es-MX fr hu it ja ja-JP-mac ko nl pl pt-BR pt-PT ru zh-CN zh-TW");
 
+pref("signon.privateBrowsingCapture.enabled", true);
+
 pref("view_source.tab", true);
 
 pref("dom.webnotifications.serviceworker.enabled", true);

browser/components/preferences/in-content/security.js

@@ -99,23 +99,15 @@ var gSecurityPane = {
 
   /**
    * Enables/disables the Exceptions button used to configure sites where
-   * passwords are never saved. When browser is set to start in Private
-   * Browsing mode, the "Remember passwords" UI is useless, so we disable it.
+   * passwords are never saved.
    */
   readSavePasswords: function ()
   {
-    var pref = document.getElementById("signon.rememberSignons");
-    var excepts = document.getElementById("passwordExceptions");
+    var prefValue = document.getElementById("signon.rememberSignons").value;
+    document.getElementById("passwordExceptions").disabled = !prefValue;
 
-    if (PrivateBrowsingUtils.permanentPrivateBrowsing) {
-      document.getElementById("savePasswords").disabled = true;
-      excepts.disabled = true;
-      return false;
-    } else {
-      excepts.disabled = !pref.value;
-      // don't override pref value in UI
-      return undefined;
-    }
+    // don't override pref value in UI
+    return undefined;
   },
 
   /**

modules/libpref/init/all.js

@@ -4098,6 +4098,7 @@ pref("signon.rememberSignons.visibilityToggle", false);
 #endif
 pref("signon.autofillForms",                true);
 pref("signon.autologin.proxy",              false);
+pref("signon.privateBrowsingCapture.enabled", false);
 pref("signon.storeWhenAutocompleteOff",     true);
 pref("signon.ui.experimental",              false);
 pref("signon.debug",                        false);

toolkit/components/passwordmgr/LoginHelper.jsm

@@ -37,6 +37,8 @@ this.LoginHelper = {
    * Warning: this only updates if a logger was created.
    */
   debug: Services.prefs.getBoolPref("signon.debug"),
+  privateBrowsingCaptureEnabled:
+    Services.prefs.getBoolPref("signon.privateBrowsingCapture.enabled"),
 
   createLogger(aLogPrefix) {
     let getMaxLogLevel = () => {
@@ -54,6 +56,8 @@ this.LoginHelper = {
     // Watch for pref changes and update this.debug and the maxLogLevel for created loggers
     Services.prefs.addObserver("signon.", () => {
       this.debug = Services.prefs.getBoolPref("signon.debug");
+      this.privateBrowsingCaptureEnabled =
+        Services.prefs.getBoolPref("signon.privateBrowsingCapture.enabled");
       logger.maxLogLevel = getMaxLogLevel();
     }, false);
 

toolkit/components/passwordmgr/LoginManagerContent.jsm

@@ -752,7 +752,8 @@ var LoginManagerContent = {
     var doc = form.ownerDocument;
     var win = doc.defaultView;
 
-    if (PrivateBrowsingUtils.isContentWindowPrivate(win)) {
+    if (PrivateBrowsingUtils.isContentWindowPrivate(win) &&
+        !LoginHelper.privateBrowsingCaptureEnabled) {
       // We won't do anything in private browsing mode anyway,
       // so there's no need to perform further checks.
       log("(form submission ignored in private browsing mode)");

toolkit/components/passwordmgr/LoginManagerParent.jsm

@@ -21,6 +21,8 @@ XPCOMUtils.defineLazyModuleGetter(this, "LoginDoorhangers",
                                   "resource://gre/modules/LoginDoorhangers.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "LoginHelper",
                                   "resource://gre/modules/LoginHelper.jsm");
+XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
+                                  "resource://gre/modules/PrivateBrowsingUtils.jsm");
 
 XPCOMUtils.defineLazyGetter(this, "log", () => {
   let logger = LoginHelper.createLogger("LoginManagerParent");
@@ -435,6 +437,10 @@ var LoginManagerParent = {
     }
 
     function recordLoginUse(login) {
+      if (!target || PrivateBrowsingUtils.isBrowserPrivate(target)) {
+        // don't record non-interactive use in private browsing
+        return;
+      }
       // Update the lastUsed timestamp and increment the use count.
       let propBag = Cc["@mozilla.org/hash-property-bag;1"].
                     createInstance(Ci.nsIWritablePropertyBag);

toolkit/components/passwordmgr/nsLoginManagerPrompter.js

@@ -326,6 +326,12 @@ LoginManagerPrompter.prototype = {
     }
   },
 
+  get _allowRememberLogin() {
+    if (!this._inPrivateBrowsing) {
+      return true;
+    }
+    return LoginHelper.privateBrowsingCaptureEnabled;
+  },
 
 
 
@@ -376,10 +382,8 @@ LoginManagerPrompter.prototype = {
 
     // If hostname is null, we can't save this login.
     if (hostname) {
-      var canRememberLogin;
-      if (this._inPrivateBrowsing)
-        canRememberLogin = false;
-      else
+      var canRememberLogin = false;
+      if (this._allowRememberLogin)
         canRememberLogin = (aSavePassword ==
                             Ci.nsIAuthPrompt.SAVE_PASSWORD_PERMANENTLY) &&
                            this._pwmgr.getLoginSavingEnabled(hostname);
@@ -614,7 +618,7 @@ LoginManagerPrompter.prototype = {
       }
 
       var canRememberLogin = this._pwmgr.getLoginSavingEnabled(hostname);
-      if (this._inPrivateBrowsing)
+      if (!this._allowRememberLogin)
         canRememberLogin = false;
 
       // if checkboxLabel is null, the checkbox won't be shown at all.
@@ -828,7 +832,7 @@ LoginManagerPrompter.prototype = {
    *        This is "password-save" or "password-change" depending on the
    *        original notification type. This is used for telemetry and tests.
    */
-  _showLoginCaptureDoorhanger(login, type) {
+  _showLoginCaptureDoorhanger(login, type, options = {}) {
     let { browser } = this._getNotifyWindow();
 
     let saveMsgNames = {
@@ -1036,7 +1040,7 @@ LoginManagerPrompter.prototype = {
       "password-notification-icon",
       mainAction,
       secondaryActions,
-      {
+      Object.assign({
         timeout: Date.now() + 10000,
         displayURI: Services.io.newURI(login.hostname, null, null),
         persistWhileVisible: true,
@@ -1080,7 +1084,7 @@ LoginManagerPrompter.prototype = {
           }
           return false;
         },
-      }
+      }, options)
     );
   },
 
@@ -1120,7 +1124,9 @@ LoginManagerPrompter.prototype = {
 
     // Notification is a PopupNotification
     if (aNotifyObj == this._getPopupNote()) {
-      this._showLoginCaptureDoorhanger(aLogin, "password-save");
+      this._showLoginCaptureDoorhanger(aLogin, "password-save", {
+        dismissed: this._inPrivateBrowsing,
+      });
     } else {
       var notNowButtonText =
             this._getLocalizedString("notifyBarNotNowButtonText");