[vsco] use '"browser": "firefox"' by default (#8127)

and re-enable TLS 1.2 cipher suites
i.e. revert c7fe6ba691

docs/configuration.rst

@@ -821,7 +821,8 @@ Default
         ``artstation`` |
         ``behance``    |
         ``fanbox``     |
-        ``twitter``
+        ``twitter``    |
+        ``vsco``
     ``null``
         otherwise
 Example
@@ -937,8 +938,7 @@ Type
 Default
     ``false``
         ``artstation`` |
-        ``behance``    |
-        ``vsco``
+        ``behance``
     ``true``
         otherwise
 Description

gallery_dl/extractor/vsco.py

@@ -22,7 +22,7 @@ class VscoExtractor(Extractor):
     directory_fmt = ("{category}", "{user}")
     filename_fmt = "{id}.{extension}"
     archive_fmt = "{id}"
-    tls12 = False
+    browser = "firefox"
 
     def __init__(self, match):
         Extractor.__init__(self, match)