--- a/tools/mercurial/hgsetup/config.py
+++ b/tools/mercurial/hgsetup/config.py
@@ -148,53 +148,16 @@ class MercurialConfig(object):
         if 'diff' not in self._c:
             self._c['diff'] = {}
 
         d = self._c['diff']
         d['git'] = 1
         d['showfunc'] = 1
         d['unified'] = 8
 
-    def have_mqext_autocommit_mq(self):
-        if 'mqext' not in self._c:
-            return False
-        v = self._c['mqext'].get('mqcommit')
-        return v == 'auto' or v == 'yes'
-
-    def ensure_mqext_autocommit_mq(self):
-        if self.have_mqext_autocommit_mq():
-            return
-        if 'mqext' not in self._c:
-            self._c['mqext'] = {}
-        self._c['mqext']['mqcommit'] = 'auto'
-
-    def have_qnew_currentuser_default(self):
-        if 'defaults' not in self._c:
-            return False
-        d = self._c['defaults']
-        if 'qnew' not in d:
-            return False
-        argv = d['qnew'].split(' ')
-        for arg in argv:
-            if arg == '--currentuser' or re.match("-[^-]*U.*", arg):
-                return True
-        return False
-
-    def ensure_qnew_currentuser_default(self):
-        if self.have_qnew_currentuser_default():
-            return
-        if 'defaults' not in self._c:
-            self._c['defaults'] = {}
-
-        d = self._c['defaults']
-        if 'qnew' not in d:
-            d['qnew'] = '-U'
-        else:
-            d['qnew'] = '-U ' + d['qnew']
-
     def get_bugzilla_credentials(self):
         if 'bugzilla' not in self._c:
             return None, None, None, None, None
 
         b = self._c['bugzilla']
         return (
             b.get('username', None),
             b.get('password', None),

--- a/tools/mercurial/hgsetup/wizard.py
+++ b/tools/mercurial/hgsetup/wizard.py
@@ -62,66 +62,27 @@ aren't comfortable giving us your full n
 
 BAD_DIFF_SETTINGS = '''
 Mozilla developers produce patches in a standard format, but your Mercurial is
 not configured to produce patches in that format.
 
 (Relevant config options: diff.git, diff.showfunc, diff.unified)
 '''.strip()
 
-MQ_INFO = '''
-The mq extension manages patches as separate files. It provides an
-alternative to the recommended bookmark-based development workflow.
-
-If you are a newcomer to Mercurial or are coming from Git, it is
-recommended to avoid mq.
-
-(Relevant config option: extensions.mq)
-
-Would you like to activate the mq extension
-'''.strip()
-
 BZEXPORT_INFO = '''
 If you plan on uploading patches to Mozilla, there is an extension called
 bzexport that makes it easy to upload patches from the command line via the
 |hg bzexport| command. More info is available at
 https://hg.mozilla.org/hgcustom/version-control-tools/file/default/hgext/bzexport/README
 
 (Relevant config option: extensions.bzexport)
 
 Would you like to activate bzexport
 '''.strip()
 
-MQEXT_INFO = '''
-The mqext extension adds a number of features, including automatically committing
-changes to your mq patch queue. More info is available at
-https://hg.mozilla.org/hgcustom/version-control-tools/file/default/hgext/mqext/README.txt
-
-(Relevant config option: extensions.mqext)
-
-Would you like to activate mqext
-'''.strip()
-
-QIMPORTBZ_INFO = '''
-The qimportbz extension
-(https://hg.mozilla.org/hgcustom/version-control-tools/file/default/hgext/qimportbz/README) makes it possible to
-import patches from Bugzilla using a friendly bz:// URL handler. e.g.
-|hg qimport bz://123456|.
-
-(Relevant config option: extensions.qimportbz)
-
-Would you like to activate qimportbz
-'''.strip()
-
-QNEWCURRENTUSER_INFO = '''
-The mercurial queues command |hg qnew|, which creates new patches in your patch
-queue does not set patch author information by default. Author information
-should be included when uploading for review.
-'''.strip()
-
 FINISHED = '''
 Your Mercurial should now be properly configured and recommended extensions
 should be up to date!
 '''.strip()
 
 REVIEWBOARD_MINIMUM_VERSION = LooseVersion('3.3')
 
 REVIEWBOARD_INCOMPATIBLE = '''
@@ -407,18 +368,16 @@ class MercurialSetupWizard(object):
                 ext_path = os.path.join(self.updater.hgwatchman_dir,
                                         'hgwatchman')
                 if self.can_use_extension(c, 'hgwatchman', ext_path):
                     c.activate_extension('hgwatchman', ext_path)
             except subprocess.CalledProcessError as e:
                 print('Error compiling hgwatchman; will not install hgwatchman')
                 print(e.output)
 
-        self.prompt_native_extension(c, 'mq', MQ_INFO)
-
         if 'reviewboard' not in c.extensions:
             if hg_version < REVIEWBOARD_MINIMUM_VERSION:
                 print(REVIEWBOARD_INCOMPATIBLE % REVIEWBOARD_MINIMUM_VERSION)
             else:
                 p = os.path.join(self.vcs_tools_dir, 'hgext', 'reviewboard',
                     'client.py')
                 self.prompt_external_extension(c, 'reviewboard',
                     'Would you like to enable the reviewboard extension so '
@@ -445,35 +404,16 @@ class MercurialSetupWizard(object):
 
         if hg_version >= PUSHTOTRY_MINIMUM_VERSION:
             self.prompt_external_extension(c, 'push-to-try', PUSHTOTRY_INFO)
 
         if not c.have_wip():
             if self._prompt_yn(WIP_INFO):
                 c.install_wip_alias()
 
-        if 'mq' in c.extensions:
-            self.prompt_external_extension(c, 'mqext', MQEXT_INFO)
-
-            if 'mqext' in c.extensions and not c.have_mqext_autocommit_mq():
-                if self._prompt_yn('Would you like to configure mqext to '
-                    'automatically commit changes as you modify patches'):
-                    c.ensure_mqext_autocommit_mq()
-                    print('Configured mqext to auto-commit.\n')
-
-            self.prompt_external_extension(c, 'qimportbz', QIMPORTBZ_INFO)
-
-            if not c.have_qnew_currentuser_default():
-                print(QNEWCURRENTUSER_INFO)
-                if self._prompt_yn('Would you like qnew to set patch author by '
-                                   'default'):
-                    c.ensure_qnew_currentuser_default()
-                    print('Configured qnew to set patch author by default.')
-                    print('')
-
         if 'reviewboard' in c.extensions or 'bzpost' in c.extensions:
             bzuser, bzpass, bzuserid, bzcookie, bzapikey = c.get_bugzilla_credentials()
 
             if not bzuser or not bzapikey:
                 print(MISSING_BUGZILLA_CREDENTIALS)
 
             if not bzuser:
                 bzuser = self._prompt('What is your Bugzilla email address? (optional)',