title: Why chrome browser is changing endpoint frequently
body: <p>I’m developing chrome push notification for my web site and doing the development in localhost (local machine) environment.  Sending push notification is success with specific endpoint which I got when I subscribe the notification first time. I use same endpoint  for all push messages.</p>
  
  <p>Here sometime push notification got failed due to endpoint mismatch. When I see in chrome console (debugging mode) there was different endpoint.
  Why chrome browser is changing endpoint? In this case how do we handle this scenario and update the new endpoint in the db? </p>
  
  <p>sample endpoint:
  <a href="https://android.googleapis.com/gcm/send/AWERdvfdfdsfdobRH4zlXGuyeuie3543uTBuP6air5dzZfltNa-FKF6K6S-9P5SdfbCbyvn9RdsfsdvU1XwSBwIrekjdK6_i4Cg-5rZAj8UvL1s-Bbr61yvvt_y2Hg9RdsyV" rel="nofollow">https://android.googleapis.com/gcm/send/AWERdvfdfdsfdobRH4zlXGuyeuie3543uTBuP6air5dzZfltNa-FKF6K6S-9P5SdfbCbyvn9RdsfsdvU1XwSBwIrekjdK6_i4Cg-5rZAj8UvL1s-Bbr61yvvt_y2Hg9RdsyV</a></p>
  
  <p>when i check next time, above endpoint got changed as like below<br>
  <a href="https://android.googleapis.com/gcm/send/reytryMkQwtY:YTUNMdsjjfhsdf349851VS6McDE7s_GITe_djsgfdkjghcdfdfgdftrkddfdsXiwX1vP_XclmDqrKPOAMJDfsYYXdhMX164694Q&amp;ksdhfksdfhkjfhksdcndsk" rel="nofollow">https://android.googleapis.com/gcm/send/reytryMkQwtY:YTUNMdsjjfhsdf349851VS6McDE7s_GITe_djsgfdkjghcdfdfgdftrkddfdsXiwX1vP_XclmDqrKPOAMJDfsYYXdhMX164694Q&amp;ksdhfksdfhkjfhksdcndsk</a></p>
  
  <p>Thank you.</p>