Reddit post notifier от Vitaly Yerofeyevsky

Watch for the latest submissions in a subreddit, reddit search and get notifications about new private messages.

Notification Sound
If you don't have notification sounds you can select one in the extension settings or install Notification Sound addon.

Keyboard shortcuts
List of keyboard shortcuts.

Authorization
Authorization is optional and is requried only for checking private mail.

Can't authorize the extension
Firefox Containers or Temporary Containers extensions could break OAuth2 authorization. You can disable them temporary and then enable again after authorization. Read more.

Feel free to create an issue on GitHub if you have any requests or the extension doesn't work.