Improve error message that is shown in ffdb when DevTools is not enabled on a FFOS device.

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/ffdb.py b/tools/ffdb.py
index a6bc716b..497f0162 100755
--- a/tools/ffdb.py
+++ b/tools/ffdb.py
@@ -323,7 +323,7 @@ def main():
 
   data = send_b2g_cmd('root', 'listTabs')
   if not 'deviceActor' in data:
-    print 'Error! Debugging connection was not available, deviceActor was not found!'
+    print 'Error! Debugging connection was not available. Make sure that the "Remote debugging" developer option on the device is set to "ADB and Devtools".'
     sys.exit(1)
   deviceActorName = data['deviceActor']
   logv('deviceActor: ' + deviceActorName)