diff --git a/README.rst b/README.rst
index 9f9c28a..c471ae1 100644
--- a/README.rst
+++ b/README.rst
@@ -1,4 +1,4 @@
-.. image:: https://travis-ci.org/internetarchive/brozzler.svg
+.. image:: https://api.travis-ci.org/internetarchive/brozzler.svg?branch=master
     :target: https://travis-ci.org/internetarchive/brozzler
 
 .. |logo| image:: https://cdn.rawgit.com/internetarchive/brozzler/1.1b12/brozzler/dashboard/static/brozzler.svg
diff --git a/brozzler/behaviors.yaml b/brozzler/behaviors.yaml
index 7667627..32ab412 100644
--- a/brozzler/behaviors.yaml
+++ b/brozzler/behaviors.yaml
@@ -25,7 +25,7 @@
     interval: 1000
     actions:
       - selector: a[data-testid="snapshot_footer_link"]
-        childSelector: i[class="_271o img sp_-vbjDsgypf1 sx_1de63f"]
+        childSelector: i[class="_271o img sp_KBE8sh--02o sx_5d0205"]
         closeSelector: 'div._7lq1 > button'
 -
   url_regex: '^https?://(?:www\.)?facebook\.com/.*$'
@@ -39,7 +39,7 @@
   url_regex: '^https?://(?:www\.)?instagram\.com/.*$'
   behavior_js_template: umbraBehavior.js.j2
   default_parameters:
-    interval: 500
+    interval: 2000
     actions:
       - selector: .glyphsSpriteGrey_Close
         rmSelector: '.RnEpo'
diff --git a/brozzler/chrome.py b/brozzler/chrome.py
index cbca3e5..671000b 100644
--- a/brozzler/chrome.py
+++ b/brozzler/chrome.py
@@ -177,6 +177,9 @@ class Chrome:
                 '--disable-web-security', '--disable-notifications',
                 '--disable-extensions', '--disable-save-password-bubble']
 
+        extra_chrome_args = os.environ.get('BROZZLER_EXTRA_CHROME_ARGS')
+        if extra_chrome_args:
+            chrome_args.extend(extra_chrome_args.split())
         if disk_cache_dir:
             chrome_args.append('--disk-cache-dir=%s' % disk_cache_dir)
         if disk_cache_size:
diff --git a/brozzler/model.py b/brozzler/model.py
index 77dae70..f65fe50 100644
--- a/brozzler/model.py
+++ b/brozzler/model.py
@@ -43,13 +43,20 @@ class JobValidator(cerberus.Validator):
         return url.scheme in ('http', 'https', 'ftp')
 
 class InvalidJobConf(Exception):
-    def __init__(self, errors):
-        self.errors = errors
+    def __init__(self, validator):
+        self.errors = validator.errors
+        try:
+            # Cerberus does a nice job hiding the bad value. In the case I
+            # debugged, I found it here. Maybe there's a better way to see it.
+            value = validator._errors[0].info[0][0].info[0][0].value
+            self.errors['bad value'] = value
+        except:
+            value = None
 
 def validate_conf(job_conf, schema=load_schema()):
     v = JobValidator(schema)
     if not v.validate(job_conf, normalize=False):
-        raise InvalidJobConf(v.errors)
+        raise InvalidJobConf(v)
 
 def merge(a, b):
     if isinstance(a, dict) and isinstance(b, dict):
diff --git a/setup.py b/setup.py
index d5442a6..ef6391d 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@ def find_package_data(package):
 
 setuptools.setup(
         name='brozzler',
-        version='1.5.15',
+        version='1.5.17',
         description='Distributed web crawling with browsers',
         url='https://github.com/internetarchive/brozzler',
         author='Noah Levitt',