Till now Mozilla has limited displaying ‘You have an unsubmitted crash report‘ notification to Firefox Nightly and developer users only, now they’ve enabled this notification in beta channel as well. The browser vendor doesn’t want to expose Firefox crashiness to release users, so they won’t get or see these notifications.
Though by submitting crash reports you can help Firefox team to fix sandbox issues, however, you can disable unsubmitted crash report notification if you don’t want to see in pre-release channels of the Firefox browser, here is how.
Disabling Firefox’s ‘You have an unsubmitted crash report’ notification
1. Visit about:config
2. Find and toggle the below preference value to false.