diff --git a/archivebox/config.py b/archivebox/config.py
index f32034ce..5a8b2295 100644
--- a/archivebox/config.py
+++ b/archivebox/config.py
@@ -238,7 +238,7 @@ CONFIG_SCHEMA: Dict[str, ConfigDefaultDict] = {
         'POCKET_CONSUMER_KEY':      {'type': str,   'default': None},
         'POCKET_ACCESS_TOKENS':     {'type': dict,  'default': {}},
 
-        'READWISE_READER_TOKENS':     {'type': dict,  'default': {}},
+        'READWISE_READER_TOKENS':   {'type': dict,  'default': {}},
     },
 }
 
@@ -554,6 +554,7 @@ DYNAMIC_CONFIG_SCHEMA: ConfigDefaultDict = {
     'CHROME_BINARY':            {'default': lambda c: c['CHROME_BINARY'] or find_chrome_binary()},
     'USE_CHROME':               {'default': lambda c: c['USE_CHROME'] and c['CHROME_BINARY'] and (c['SAVE_PDF'] or c['SAVE_SCREENSHOT'] or c['SAVE_DOM'] or c['SAVE_SINGLEFILE'])},
     'CHROME_VERSION':           {'default': lambda c: bin_version(c['CHROME_BINARY']) if c['USE_CHROME'] else None},
+    'CHROME_USER_AGENT':        {'default': lambda c: c['CHROME_USER_AGENT'].format(**c)},
 
     'SAVE_PDF':                 {'default': lambda c: c['USE_CHROME'] and c['SAVE_PDF']},
     'SAVE_SCREENSHOT':          {'default': lambda c: c['USE_CHROME'] and c['SAVE_SCREENSHOT']},
@@ -571,7 +572,7 @@ DYNAMIC_CONFIG_SCHEMA: ConfigDefaultDict = {
     'DATA_LOCATIONS':           {'default': lambda c: get_data_locations(c)},
     'CHROME_OPTIONS':           {'default': lambda c: get_chrome_info(c)},
     'SAVE_ALLOWLIST_PTN':       {'default': lambda c: c['SAVE_ALLOWLIST'] and {re.compile(k, ALLOWDENYLIST_REGEX_FLAGS): v for k, v in c['SAVE_ALLOWLIST'].items()}},
-    'SAVE_DENYLIST_PTN':       {'default': lambda c: c['SAVE_DENYLIST'] and {re.compile(k, ALLOWDENYLIST_REGEX_FLAGS): v for k, v in c['SAVE_DENYLIST'].items()}},
+    'SAVE_DENYLIST_PTN':        {'default': lambda c: c['SAVE_DENYLIST'] and {re.compile(k, ALLOWDENYLIST_REGEX_FLAGS): v for k, v in c['SAVE_DENYLIST'].items()}},
 }