Bug 613785 - Tab modal http auth prompts. r=johannh

Differential Revision: https://phabricator.services.mozilla.com/D75568

modules/libpref/init/all.js

@@ -4550,6 +4550,14 @@ pref("browser.sanitizer.loglevel", "Warn");
 // To disable blocking of auth prompts, set the limit to -1.
 pref("prompts.authentication_dialog_abuse_limit", 2);
 
+// The prompt type to use for http auth prompts
+// content: 1, tab: 2, window: 3
+#ifdef NIGHTLY_BUILD
+  pref("prompts.modalType.httpAuth", 2);
+#else
+  pref("prompts.modalType.httpAuth", 3);
+#endif
+
 // Payment Request API preferences
 pref("dom.payments.loglevel", "Warn");
 pref("dom.payments.defaults.saveCreditCard", false);

toolkit/components/passwordmgr/LoginManagerAuthPrompter.jsm

@@ -752,8 +752,9 @@ LoginManagerAuthPrompter.prototype = {
           this._browser
         );
       }
-      ok = Services.prompt.promptAuth(
-        this._chromeWindow,
+      ok = Services.prompt.promptAuthBC(
+        this._browser.browsingContext,
+        LoginManagerAuthPrompter.promptAuthModalType,
         aChannel,
         aLevel,
         aAuthInfo,
@@ -1292,6 +1293,13 @@ XPCOMUtils.defineLazyGetter(LoginManagerAuthPrompter.prototype, "log", () => {
   return logger.log.bind(logger);
 });
 
+XPCOMUtils.defineLazyPreferenceGetter(
+  LoginManagerAuthPrompter,
+  "promptAuthModalType",
+  "prompts.modalType.httpAuth",
+  Services.prompt.MODAL_TYPE_WINDOW
+);
+
 const EXPORTED_SYMBOLS = [
   "LoginManagerAuthPromptFactory",
   "LoginManagerAuthPrompter",