diff --git a/brozzler/__init__.py b/brozzler/__init__.py
index 46a0704..6853c40 100644
--- a/brozzler/__init__.py
+++ b/brozzler/__init__.py
@@ -86,23 +86,7 @@ def behaviors():
         behaviors_yaml = os.path.join(
                 os.path.dirname(__file__), 'behaviors.yaml')
         with open(behaviors_yaml) as fin:
-            conf = yaml.load(fin)
-        _behaviors = conf['behaviors']
-
-        for behavior in _behaviors:
-            if 'behavior_js' in behavior:
-                behavior_js = os.path.join(
-                        os.path.dirname(__file__), 'behaviors.d',
-                        behavior['behavior_js'])
-                with open(behavior_js, encoding='utf-8') as fin:
-                    behavior['script'] = fin.read()
-            elif 'behavior_js_template' in behavior:
-                behavior_js_template = os.path.join(
-                        os.path.dirname(__file__), 'behaviors.d',
-                        behavior['behavior_js_template'])
-                with open(behavior_js_template, encoding='utf-8') as fin:
-                    behavior['template'] = string.Template(fin.read())
-
+            _behaviors = yaml.load(fin)
     return _behaviors
 
 def behavior_script(url, template_parameters=None):
@@ -112,22 +96,18 @@ def behavior_script(url, template_parameters=None):
     import re, logging
     for behavior in behaviors():
         if re.match(behavior['url_regex'], url):
-            if 'behavior_js' in behavior:
-                logging.info(
-                        'using behavior %s for %s',
-                        behavior['behavior_js'], url)
-                return behavior['script']
-            elif 'behavior_js_template' in behavior:
-                parameters = dict()
-                if 'default_parameters' in behavior:
-                    parameters.update(behavior['default_parameters'])
-                if template_parameters:
-                    parameters.update(template_parameters)
-                script = behavior['template'].safe_substitute(parameters)
-                logging.info(
-                        'using template=%s populated with parameters=%s for %s',
-                        repr(behavior['behavior_js_template']), parameters, url)
-                return script
+            parameters = dict()
+            if 'default_parameters' in behavior:
+                parameters.update(behavior['default_parameters'])
+            if template_parameters:
+                parameters.update(template_parameters)
+            template = jinja2_environment().get_template(
+                    behavior['behavior_js_template'])
+            script = template.render(parameters)
+            logging.info(
+                    'using template=%s populated with parameters=%s for %s',
+                    repr(behavior['behavior_js_template']), parameters, url)
+            return script
     return None
 
 def thread_raise(thread, exctype):
diff --git a/brozzler/behaviors.yaml b/brozzler/behaviors.yaml
index c9697c0..8a7dab2 100644
--- a/brozzler/behaviors.yaml
+++ b/brozzler/behaviors.yaml
@@ -17,83 +17,82 @@
 #
 
 # first matched behavior is used, so order matters here
-behaviors:
- -
-   url_regex: '^https?://(?:www\.)?facebook\.com/.*$'
-   behavior_js_template: facebook.js.template
-   # default_parameters:
-   #    parameter_username: jdoe@example.com
-   #    parameter_password: abcd1234
-   request_idle_timeout_sec: 30
- -
-   url_regex: '^https?://(?:www\.)?marquette\.edu/.*$'
-   behavior_js: marquette_edu.js
-   request_idle_timeout_sec: 10
- -
-   url_regex: '^https?://(?:www\.)?vimeo\.com/.*$'
-   behavior_js: vimeo.js
-   request_idle_timeout_sec: 10
- -
-   url_regex: '^https?://(?:www\.)?psu24.psu.edu/.*$'
-   behavior_js: psu24.js
-   request_idle_timeout_sec: 10
- -
-   url_regex: '^https?://(?:www\.)?instagram\.com/.*$'
-   behavior_js: instagram.js
-   request_idle_timeout_sec: 10
- -
-   url_regex: '^https?://(?:www\.)?brooklynmuseum\.org/exhibitions/.*$'
-   behavior_js_template: simpleclicks.js.template
-   default_parameters:
-      click_css_selector: img.img-responsive
-   request_idle_timeout_sec: 10
- - # acalog https://webarchive.jira.com/browse/ARI-3775
-   url_regex: '^https?://.*[?&]catoid=[^?]*$'
-   behavior_js_template: simpleclicks.js.template
-   default_parameters:
-      click_css_selector: a[onclick]
-   request_idle_timeout_sec: 10
- - # https://webarchive.jira.com/browse/ARI-3956
-   url_regex: '^https?://(?:www\.)?usask.ca/.*$'
-   behavior_js_template: simpleclicks.js.template
-   default_parameters:
-      click_css_selector: a[id='feature-next']
-   request_idle_timeout_sec: 10
- - # https://webarchive.jira.com/browse/AITFIVE-451
-   url_regex: '^https?://(?:www\.)?soundcloud.com/.*$'
-   behavior_js_template: simpleclicks.js.template
-   default_parameters:
-      click_css_selector: button.sc-button-play, button.playButton
-   request_idle_timeout_sec: 10
- - # https://webarchive.jira.com/browse/AITFIVE-463
-   url_regex: '^https?://(?:www\.)?christophercerrone.com/.*$'
-   behavior_js_template: simpleclicks.js.template
-   default_parameters:
-      click_css_selector: button.playButton.medium
-   request_idle_timeout_sec: 10
- - # https://webarchive.jira.com/browse/ARI-4690
-   url_regex: '^https?://(?:www\.)?youtube.com/.*$'
-   behavior_js_template: simpleclicks.js.template
-   default_parameters:
-      click_css_selector: span.load-more-text
-   request_idle_timeout_sec: 10
- - # https://webarchive.jira.com/browse/ARI-4725
-   url_regex: '^https?://(?:www\.)?moma.org/.*$'
-   behavior_js_template: simpleclicks.js.template
-   default_parameters:
-      click_css_selector: button[data-more-results-bottom-button]
-      click_until_hard_timeout: True
-   request_idle_timeout_sec: 10
- - # https://webarchive.jira.com/browse/ARI-4692
-   url_regex: '^https?://(?:www\.)?fec.gov/data/.*$'
-   behavior_js: fec_gov.js
-   request_idle_timeout_sec: 10
- - url_regex: '^https?://(?:www\.)?news\.com\.au/.*$'
-   behavior_js_template: mouseovers.js.template
-   default_parameters:
-      mouseover_css_selector: .menu-item a
-   request_idle_timeout_sec: 10
- - # default fallback behavior
-   url_regex: '^.*$'
-   request_idle_timeout_sec: 10
-   behavior_js: default.js
+-
+  url_regex: '^https?://(?:www\.)?facebook\.com/.*$'
+  behavior_js_template: facebook.js.j2
+  # default_parameters:
+  #    parameter_username: jdoe@example.com
+  #    parameter_password: abcd1234
+  request_idle_timeout_sec: 30
+-
+  url_regex: '^https?://(?:www\.)?marquette\.edu/.*$'
+  behavior_js_template: marquette_edu.js
+  request_idle_timeout_sec: 10
+-
+  url_regex: '^https?://(?:www\.)?vimeo\.com/.*$'
+  behavior_js_template: vimeo.js
+  request_idle_timeout_sec: 10
+-
+  url_regex: '^https?://(?:www\.)?psu24.psu.edu/.*$'
+  behavior_js_template: psu24.js
+  request_idle_timeout_sec: 10
+-
+  url_regex: '^https?://(?:www\.)?instagram\.com/.*$'
+  behavior_js_template: instagram.js
+  request_idle_timeout_sec: 10
+-
+  url_regex: '^https?://(?:www\.)?brooklynmuseum\.org/exhibitions/.*$'
+  behavior_js_template: simpleclicks.js.j2
+  default_parameters:
+     click_css_selector: img.img-responsive
+  request_idle_timeout_sec: 10
+- # acalog https://webarchive.jira.com/browse/ARI-3775
+  url_regex: '^https?://.*[?&]catoid=[^?]*$'
+  behavior_js_template: simpleclicks.js.j2
+  default_parameters:
+     click_css_selector: a[onclick]
+  request_idle_timeout_sec: 10
+- # https://webarchive.jira.com/browse/ARI-3956
+  url_regex: '^https?://(?:www\.)?usask.ca/.*$'
+  behavior_js_template: simpleclicks.js.j2
+  default_parameters:
+     click_css_selector: a[id='feature-next']
+  request_idle_timeout_sec: 10
+- # https://webarchive.jira.com/browse/AITFIVE-451
+  url_regex: '^https?://(?:www\.)?soundcloud.com/.*$'
+  behavior_js_template: simpleclicks.js.j2
+  default_parameters:
+     click_css_selector: button.sc-button-play, button.playButton
+  request_idle_timeout_sec: 10
+- # https://webarchive.jira.com/browse/AITFIVE-463
+  url_regex: '^https?://(?:www\.)?christophercerrone.com/.*$'
+  behavior_js_template: simpleclicks.js.j2
+  default_parameters:
+     click_css_selector: button.playButton.medium
+  request_idle_timeout_sec: 10
+- # https://webarchive.jira.com/browse/ARI-4690
+  url_regex: '^https?://(?:www\.)?youtube.com/.*$'
+  behavior_js_template: simpleclicks.js.j2
+  default_parameters:
+     click_css_selector: span.load-more-text
+  request_idle_timeout_sec: 10
+- # https://webarchive.jira.com/browse/ARI-4725
+  url_regex: '^https?://(?:www\.)?moma.org/.*$'
+  behavior_js_template: simpleclicks.js.j2
+  default_parameters:
+     click_css_selector: button[data-more-results-bottom-button]
+     click_until_hard_timeout: True
+  request_idle_timeout_sec: 10
+- # https://webarchive.jira.com/browse/ARI-4692
+  url_regex: '^https?://(?:www\.)?fec.gov/data/.*$'
+  behavior_js_template: fec_gov.js
+  request_idle_timeout_sec: 10
+- url_regex: '^https?://(?:www\.)?news\.com\.au/.*$'
+  behavior_js_template: mouseovers.js.j2
+  default_parameters:
+     mouseover_css_selector: .menu-item a
+  request_idle_timeout_sec: 10
+- # default fallback behavior
+  url_regex: '^.*$'
+  request_idle_timeout_sec: 10
+  behavior_js_template: default.js
diff --git a/brozzler/browser.py b/brozzler/browser.py
index 6f2058b..5595e7a 100644
--- a/brozzler/browser.py
+++ b/brozzler/browser.py
@@ -420,30 +420,13 @@ class Browser:
                 lambda: self.websock_thread.got_page_load_event,
                 timeout=timeout)
 
-    OUTLINKS_JS = r'''
-var __brzl_framesDone = new Set();
-var __brzl_compileOutlinks = function(frame) {
-    __brzl_framesDone.add(frame);
-    if (frame && frame.document) {
-        var outlinks = Array.prototype.slice.call(
-                frame.document.querySelectorAll('a[href]'));
-        for (var i = 0; i < frame.frames.length; i++) {
-            if (frame.frames[i] && !__brzl_framesDone.has(frame.frames[i])) {
-                outlinks = outlinks.concat(
-                            __brzl_compileOutlinks(frame.frames[i]));
-            }
-        }
-    }
-    return outlinks;
-}
-__brzl_compileOutlinks(window).join('\n');
-'''
     def extract_outlinks(self, timeout=60):
         self.logger.info('extracting outlinks')
         self.websock_thread.expect_result(self._command_id.peek())
+        js = brozzler.jinja2_environment().get_template(
+                'extract-outlinks.js').render()
         msg_id = self.send_to_chrome(
-                method='Runtime.evaluate',
-                params={'expression': self.OUTLINKS_JS})
+                method='Runtime.evaluate', params={'expression': js})
         self._wait_for(
                 lambda: self.websock_thread.received_result(msg_id),
                 timeout=timeout)
@@ -524,64 +507,9 @@ __brzl_compileOutlinks(window).join('\n');
             except BrowsingTimeout:
                 pass
 
-    TRY_LOGIN_JS_J2 = '''
-var __brzl_tryLoginState = 'trying';
-
-var __brzl_tryLogin = function() {
-    for (var i = 0; i < document.forms.length; i++) {
-        var form = document.forms[i];
-        if (form.method != 'post') {
-            continue;
-        }
-        var usernameField, passwordField;
-        for (var j = 0; j < form.elements.length; j++) {
-            var field = form.elements[j];
-            if (field.type == 'text' || field.type == 'email') {
-                if (!usernameField) {
-                    usernameField = field;
-                } else {
-                    usernameField = undefined;
-                    break;
-                }
-            } else if (field.type == 'password') {
-                if (!passwordField) {
-                    passwordField = field;
-                } else {
-                    passwordField = undefined;
-                    break;
-                }
-            } else if (field.type == 'textarea') {
-                usernameField = undefined;
-                passwordField = undefined;
-                break;
-            }
-        }
-        if (usernameField && passwordField) {
-            usernameField.value = {{username|json}};
-            passwordField.value = {{password|json}};
-            console.log('submitting username=' + usernameField.value
-                        + ' password=*** to detected login form');
-            try {
-                form.submit();
-            } catch (e) {
-                // "If a form control (such as a submit button) has a name or
-                // id of 'submit' it will mask the form's submit method." -MDN
-                // http://stackoverflow.com/a/2000021
-                var pseudoForm = document.createElement('form');
-                pseudoForm.submit.apply(form);
-            }
-            __brzl_tryLoginState = 'submitted-form';
-            return;
-        }
-    }
-    __brzl_tryLoginState = 'login-form-not-found';
-};
-
-__brzl_tryLogin();
-'''
     def try_login(self, username, password, timeout=300):
-        try_login_js = brozzler.jinja2_environment().from_string(
-                self.TRY_LOGIN_JS_J2).render(
+        try_login_js = brozzler.jinja2_environment().get_template(
+                'try-login.js.j2').render(
                         username=username, password=password)
 
         self.websock_thread.got_page_load_event = None
diff --git a/brozzler/behaviors.d/default.js b/brozzler/js-templates/default.js
similarity index 100%
rename from brozzler/behaviors.d/default.js
rename to brozzler/js-templates/default.js
diff --git a/brozzler/js-templates/extract-outlinks.js b/brozzler/js-templates/extract-outlinks.js
new file mode 100644
index 0000000..3be0dfc
--- /dev/null
+++ b/brozzler/js-templates/extract-outlinks.js
@@ -0,0 +1,16 @@
+var __brzl_framesDone = new Set();
+var __brzl_compileOutlinks = function(frame) {
+    __brzl_framesDone.add(frame);
+    if (frame && frame.document) {
+        var outlinks = Array.prototype.slice.call(
+                frame.document.querySelectorAll('a[href]'));
+        for (var i = 0; i < frame.frames.length; i++) {
+            if (frame.frames[i] && !__brzl_framesDone.has(frame.frames[i])) {
+                outlinks = outlinks.concat(
+                            __brzl_compileOutlinks(frame.frames[i]));
+            }
+        }
+    }
+    return outlinks;
+}
+__brzl_compileOutlinks(window).join('\n');
diff --git a/brozzler/behaviors.d/facebook.js.template b/brozzler/js-templates/facebook.js.j2
similarity index 100%
rename from brozzler/behaviors.d/facebook.js.template
rename to brozzler/js-templates/facebook.js.j2
diff --git a/brozzler/behaviors.d/fec_gov.js b/brozzler/js-templates/fec_gov.js
similarity index 100%
rename from brozzler/behaviors.d/fec_gov.js
rename to brozzler/js-templates/fec_gov.js
diff --git a/brozzler/behaviors.d/instagram.js b/brozzler/js-templates/instagram.js
similarity index 100%
rename from brozzler/behaviors.d/instagram.js
rename to brozzler/js-templates/instagram.js
diff --git a/brozzler/behaviors.d/marquette_edu.js b/brozzler/js-templates/marquette_edu.js
similarity index 100%
rename from brozzler/behaviors.d/marquette_edu.js
rename to brozzler/js-templates/marquette_edu.js
diff --git a/brozzler/behaviors.d/mouseovers.js.template b/brozzler/js-templates/mouseovers.js.j2
similarity index 100%
rename from brozzler/behaviors.d/mouseovers.js.template
rename to brozzler/js-templates/mouseovers.js.j2
diff --git a/brozzler/behaviors.d/psu24.js b/brozzler/js-templates/psu24.js
similarity index 100%
rename from brozzler/behaviors.d/psu24.js
rename to brozzler/js-templates/psu24.js
diff --git a/brozzler/behaviors.d/simpleclicks.js.template b/brozzler/js-templates/simpleclicks.js.j2
similarity index 100%
rename from brozzler/behaviors.d/simpleclicks.js.template
rename to brozzler/js-templates/simpleclicks.js.j2
diff --git a/brozzler/js-templates/try-login.js.j2 b/brozzler/js-templates/try-login.js.j2
new file mode 100644
index 0000000..e6bbfa3
--- /dev/null
+++ b/brozzler/js-templates/try-login.js.j2
@@ -0,0 +1,53 @@
+var __brzl_tryLoginState = 'trying';
+
+var __brzl_tryLogin = function() {
+    for (var i = 0; i < document.forms.length; i++) {
+        var form = document.forms[i];
+        if (form.method != 'post') {
+            continue;
+        }
+        var usernameField, passwordField;
+        for (var j = 0; j < form.elements.length; j++) {
+            var field = form.elements[j];
+            if (field.type == 'text' || field.type == 'email') {
+                if (!usernameField) {
+                    usernameField = field;
+                } else {
+                    usernameField = undefined;
+                    break;
+                }
+            } else if (field.type == 'password') {
+                if (!passwordField) {
+                    passwordField = field;
+                } else {
+                    passwordField = undefined;
+                    break;
+                }
+            } else if (field.type == 'textarea') {
+                usernameField = undefined;
+                passwordField = undefined;
+                break;
+            }
+        }
+        if (usernameField && passwordField) {
+            usernameField.value = {{username|json}};
+            passwordField.value = {{password|json}};
+            console.log('submitting username=' + usernameField.value
+                        + ' password=*** to detected login form');
+            try {
+                form.submit();
+            } catch (e) {
+                // "If a form control (such as a submit button) has a name or
+                // id of 'submit' it will mask the form's submit method." -MDN
+                // http://stackoverflow.com/a/2000021
+                var pseudoForm = document.createElement('form');
+                pseudoForm.submit.apply(form);
+            }
+            __brzl_tryLoginState = 'submitted-form';
+            return;
+        }
+    }
+    __brzl_tryLoginState = 'login-form-not-found';
+};
+
+__brzl_tryLogin();
diff --git a/brozzler/behaviors.d/vimeo.js b/brozzler/js-templates/vimeo.js
similarity index 100%
rename from brozzler/behaviors.d/vimeo.js
rename to brozzler/js-templates/vimeo.js
diff --git a/setup.py b/setup.py
index f009fe0..2df83d2 100644
--- a/setup.py
+++ b/setup.py
@@ -32,7 +32,7 @@ def find_package_data(package):
 
 setuptools.setup(
         name='brozzler',
-        version='1.1b9.dev148',
+        version='1.1b9.dev149',
         description='Distributed web crawling with browsers',
         url='https://github.com/internetarchive/brozzler',
         author='Noah Levitt',
@@ -41,7 +41,8 @@ setuptools.setup(
         license='Apache License 2.0',
         packages=['brozzler', 'brozzler.dashboard'],
         package_data={
-            'brozzler': ['behaviors.d/*.js*', 'behaviors.yaml', 'job_schema.yaml'],
+            'brozzler': [
+                'js-templates/*.js*', 'behaviors.yaml', 'job_schema.yaml'],
             'brozzler.dashboard': find_package_data('brozzler.dashboard'),
         },
         entry_points={