[artstation] restore 'browser' and 'tls12' defaults

partially revert 954796a466

docs/configuration.rst

@@ -673,7 +673,7 @@ extractor.*.browser
 Type
     ``string``
 Default
-    * ``"firefox"``: ``mangasee``, ``twitter``
+    * ``"firefox"``: ``artstation``, ``mangasee``, ``twitter``
     * ``null``: otherwise
 Example
     * ``"chrome:macos"``
@@ -749,7 +749,8 @@ extractor.*.tls12
 Type
     ``bool``
 Default
-    ``true``
+    * ``false``: ``artstation``
+    * ``true``: otherwise
 Description
     Allow selecting TLS 1.2 cipher suites.
 

gallery_dl/extractor/artstation.py

@@ -19,6 +19,8 @@ class ArtstationExtractor(Extractor):
     filename_fmt = "{category}_{id}_{asset[id]}_{title}.{extension}"
     directory_fmt = ("{category}", "{userinfo[username]}")
     archive_fmt = "{asset[id]}"
+    browser = "firefox"
+    tls12 = False
     root = "https://www.artstation.com"
 
     def __init__(self, match):