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Android System UI crashes after a download completes in Firefox for Android.

  • 6 replies
  • 4 have this problem
  • 78 views
  • Last reply by ミヤ

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About a week ago my phone (Sony Xperia ZX2 Premium running Android 10) started 'crashing to the lock screen' whenever a download finished in the mobile version of Firefox. If multiple files are downloaded in short succession a popup will appear informing me that the 'System UI keeps stopping', with a prompt to close the app or to get to the app info (see the attached photo - clicking either option sends me back to the lockscreen, with the only difference being that after unlocking the phone the former will have stayed with Firefox in focus, and the latter having opened the Settings app on the System UI entry).

Going to about:crashes shows no recent crashes on Firefox's ends. (Plus, Firefox shows no signs of having been closed [like tabs being reloaded] after unlocking the phone again post-crash). The issue currently only happens when downloading a file through Firefox; downloading a file through Edge, Discord, or the Google Drive app produces no problems.

I have already tried force-stopping and restarting Firefox, restarting the phone, and clearing the download history with no luck. Furthermore, I have also checked for updates for the system, the Google Play Store, and Firefox for Android, however all of them were already up to date.

Any help would be sincerely appreciated.

About a week ago my phone (Sony Xperia ZX2 Premium running Android 10) started 'crashing to the lock screen' whenever a download finished in the mobile version of Firefox. If multiple files are downloaded in short succession a popup will appear informing me that the 'System UI keeps stopping', with a prompt to close the app or to get to the app info (see the attached photo - clicking either option sends me back to the lockscreen, with the only difference being that after unlocking the phone the former will have stayed with Firefox in focus, and the latter having opened the Settings app on the System UI entry). Going to about:crashes shows no recent crashes on Firefox's ends. (Plus, Firefox shows no signs of having been closed [like tabs being reloaded] after unlocking the phone again post-crash). The issue currently only happens when downloading a file through Firefox; downloading a file through Edge, Discord, or the Google Drive app produces no problems. I have already tried force-stopping and restarting Firefox, restarting the phone, and clearing the download history with no luck. Furthermore, I have also checked for updates for the system, the Google Play Store, and Firefox for Android, however all of them were already up to date. Any help would be sincerely appreciated.
Attached screenshots

All Replies (6)

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Hi

How much free space do you have on your Android device?

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I still have roughly 9GB of free space. (That's ~14% of the total disk space.)

Modified by merelyap

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Okay, thank you. Asude from Discord, what other apps do you have open when this happens?

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Besides Discord I often have a timer running in the clock app, and occasionally the Gallery or Music app are open in the background, but other than those I don't have any other apps open. Though the problem still occurs after a restart, when the only open app is Firefox. In any case, thank you for trying to troubleshoot the problem with me. I appreciate the help.

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Quick update: I have just tried reinstalling Firefox but the problem still persists.

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Hm... I think you can try Firefox Beta 120.0b9. I have a similar issue with Firefox 119.1.1 on Android 10 I'm using, but on that beta release downloading files works as it should, without phone "restarts" (a form of UI crash on my device).