Can't start backup

Question

I'm trying to backup using adb backup org.mozilla.firefox on a Nokia 8 (with Android 8.0).



I get the screen where it asks for a password. There are two texts at the bottom "Cancel" and "Backup my Data". They look identical (i.e. it looks as if I can click either) but nothing happens when I press "Backup my Data". What is going on?



I also tried to enter a password but that doesn't help.



Same effect with adb backup -apk org.mozilla.firefox: in both cases, only an empty backup.ab file is created. To be sure, I've also included the -f option to explicitly specify an output file name – same effect, the file stays empty.



adb version 1.0.39.


— Aaron Digulla | Sources

Answer

Mozilla disabled backups back in 2015, documented in Bugzilla.



Of course this causes a lot of trouble for people trying to get access to their own data.


— devio | Sources

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