diff --git a/docs/log-files.adoc b/docs/log-files.adoc
index 4e54f3c..a34ed54 100644
--- a/docs/log-files.adoc
+++ b/docs/log-files.adoc
@@ -1,13 +1,14 @@
 == Log Files
 A typical log file looks like the following:
-```
+----
 2017/04/18 03:52:36 [12413389] [SESSION_ATTEMPTED] [my_quota] [192.168.2.3] [firefox-42.0] [firefox42-1.example.com:4444] [1]
 2017/04/18 03:52:40 [12413389] [SESSION_FAILED] [my_quota] [192.168.2.3] [firefox-42.0] [firefox42-1.example.com:4444] Error forwarding the new session Request timed out waiting for a node to become available.
 2017/04/18 03:52:40 [12413390] [SESSION_ATTEMPTED] [my_quota] [192.168.2.3] [firefox-42.0] [firefox42-5.example.com:4444] [2]
 2017/04/18 03:52:45 [12413390] [5.86s] [SESSION_CREATED] [my_quota] [192.168.2.3] [firefox-42.0] [firefox42-5.example.com:4444] [0c500a6f-98d2-4871-acb7-637d85e1416a] [2]
 ....
 2017/04/18 03:53:05 [SESSION_DELETED] [192.168.2.3] [firefox42-5.example.com:4444] [0c500a6f-98d2-4871-acb7-637d85e1416a]
-```
+----
+
 Every line contains:
 
 .Log entry contents
@@ -72,7 +73,7 @@ The following statuses are available:
 |===
 
 === Custom Labels in Log File
-Sometimes you may need to add some custom metadata like build number or branch name to Selenium logs. Just add the following capability to your tests:
+Sometimes you may need to add some custom metadata like build number or branch name to Selenium logs. Just add the following capability to your tests under `ggr:options`:
 
 .Type: map, format: "<key>": "<value>"
 ----
@@ -80,7 +81,7 @@ labels: {"buildNumber": 122, "branch": "feature-XXX"}
 ----
 
 With this capability browser column will look like this:
-```
+----
 [firefox-42.0 buildNumber=122 branch=feature-XXX]
-```
+----
 Such additional metadata in logs allows to better analyze respective Selenium sessions.
diff --git a/proxy.go b/proxy.go
index 2a190ab..1a81e04 100644
--- a/proxy.go
+++ b/proxy.go
@@ -111,7 +111,7 @@ func (c caps) capabilities(fn func(m map[string]interface{}, w3c bool, extension
 			}
 			if match != nil {
 				fn(match, true, false)
-				for k, v := range m { // Extension capabilities have ":" in key
+				for k, v := range match { // Extension capabilities have ":" in key
 					if ec, ok := v.(map[string]interface{}); ok && strings.Contains(k, ":") {
 						fn(ec, true, true)
 					}
@@ -808,10 +808,10 @@ func defaultErrorHandler(requestId uint64) func(http.ResponseWriter, *http.Reque
 
 func mux() http.Handler {
 	mux := http.NewServeMux()
-	authenticator := auth.NewBasicAuthenticator(
-		"Selenium Grid Router",
-		auth.HtpasswdFileProvider(users),
-	)
+	authenticator := &auth.BasicAuth{
+		Realm:   "Selenium Grid Router",
+		Secrets: auth.HtpasswdFileProvider(users),
+	}
 	mux.HandleFunc(paths.Ping, ping)
 	mux.HandleFunc(paths.Status, status)
 	mux.HandleFunc(paths.Err, err)
diff --git a/proxy_test.go b/proxy_test.go
index b9f3cbd..7d563ff 100644
--- a/proxy_test.go
+++ b/proxy_test.go
@@ -1695,10 +1695,10 @@ func TestPanicGuestQuotaMissingUsersFileAuthPresent(t *testing.T) {
 	defer func() {
 		users = ".htpasswd"
 	}()
-	authenticator := auth.NewBasicAuthenticator(
-		"Some Realm",
-		auth.HtpasswdFileProvider(users),
-	)
+	authenticator := &auth.BasicAuth{
+		Realm:   "Some Realm",
+		Secrets: auth.HtpasswdFileProvider(users),
+	}
 
 	mux := http.NewServeMux()
 	mux.HandleFunc("/", WithSuitableAuthentication(authenticator, func(_ http.ResponseWriter, _ *http.Request) {}))
@@ -1720,3 +1720,10 @@ func TestPlatformCapability(t *testing.T) {
 
 	AssertThat(t, caps.platform(), EqualTo{"WINDOWS"})
 }
+
+func TestLabelsCapabilityFromExtensions(t *testing.T) {
+	var caps caps
+	testCaps := `{"capabilities": {"alwaysMatch":{"ggr:options": {"labels": {"some-key": "some-value"}}}}}`
+	_ = json.Unmarshal([]byte(testCaps), &caps)
+	AssertThat(t, caps.labels(), EqualTo{"some-key=some-value"})
+}