It is written here that the push notifications will work even if the browser is closed, but I tested it and it is not the case. I receive push-notifications only if the browser is open (doesnt matter if the particular webpage is open or not).
I tested this on chrome for Desktop & chrome for Android (after updating to latest version).
my question is :- For push notifications to work should the browser be open?
Note:- I used this for testing.
According to Can I Use, Chrome and Firefox desktop browsers require the browser to be running for receiving push notifications; mobile browsers typically don't.
On desktop, browsers need a process running. For example on Mac OS X the browser can have no window open but if you look at the dock, the light underneath icon can be glowing (meaning it has a process running). In the scenario you should receive push messages.
If the browser was completely quit, then push messages won't get through.
The same applies to windows and Linux.
On android you should be receiving the messages regardless of whether the browser is open or not. This is in part (as far as I know) to the fact that android manages it's connection to the push service rather than the browser, so it'll receive messages whenever possible.
The messages should (eventually) get through even if they are sent while the browser is closed, or the device is offline, etc. (And this works for me using https://gauntface.github.io/simple-push-demo/ and other tests.)
On desktop the browser needs to be running since that is the process that receives the push messages. Some extensions, like hangouts force the browser to keep running even when the last tab is closed so for users with one such extension installed push will work all the time.
On Android, the browser does not need to be running since the entity in charge of receiving the messages is baked into Google Play Services.
The Chrome team is working on the desktop issue in https://bugs.chromium.org/p/chromium/issues/detail?id=402456
It is possible to write Chrome extension where background script can run if Chrome is allowed to run in the background (configurable in settings). It can also use GCM.
EDIT:
For service worker to run in the background even if no tab or window is opened there must be at least one Chrome extension with background permissions installed and Chrome must be allowed to run apps in background. Tested on Linux.
I worked on demo to provide push notifications on Google Chrome and Firefox. Demo -> https://twitter.com/d_danailov/status/1163824171480166400
If someone has a question could ping me on twitter.
The public URL: https://push-notifications-ddanailov.firebaseapp.com/ Repo: https://push-notifications-ddanailov.firebaseapp.com
来源：https://stackoverflow.com/questions/39034950/google-chrome-push-notifications-not-working-if-the-browser-is-closed