2043185 - Unable to delete profiles through the profile manager UI

Status: RESOLVED FIXED

(Toolkit :: Startup and Profile System, defect)

Description

[Segun Famisa [:segun]]

Attachment: about-support

Build: 153.0a1 (2026-05-27) (aarch64)

Yesterday, I created a profile called "DELETE ME" to test something, but I am unable to delete it now.

• I have attached a video repro for it.
• I don't see any logs in the console

There has been a recent report about the similar issue in https://support.mozilla.org/questions/1583113

If there's any other way I can help debug this, please let me know.

Comment 1

[Dave Townsend [:mossop]]

This is a regression from bug 2022414. In the profile the value of the preference browser.backup.enabled_on.profiles is {} so this code fails: https://searchfox.org/firefox-main/rev/e28b34ab33dbf49364999070168cbb7e11e8e5bd/browser/components/backup/BackupService.sys.mjs#5588-5591

Comment 2

[Dave Townsend [:mossop]]

I suspect what is going on here is that because browser.backup.enabled_on.profiles is a shared preference we will be overwriting its value on startup with the value from the shared database, and I guess this is happening after the migration from bug 2022414 ran.

Comment 3

[BugBot [:suhaib / :marco]]

Set release status flags based on info from the regressing bug 2022414

Comment 4

[Harshit Sohaney [:hsohaney]]

Attachment: Bug 2043185 - Move enabledOn pref migration to be on read to avoid potential shared db races. r=mossop,#backup-reviewers

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/86958a52c340
https://hg.mozilla.org/integration/autoland/rev/84bb1198e9e4
Move enabledOn pref migration to be on read to avoid potential shared db races. r=sthompson

Comment 6

[amarc]

https://hg.mozilla.org/mozilla-central/rev/84bb1198e9e4

Comment 7

[japandi]

Hopefully, this has been resolved.

Comment 8

[Harshit Sohaney [:hsohaney]]

Attachment: Bug 2043185 - Move enabledOn pref migration to be on read to avoid potential shared db races. r=mossop,#backup-reviewers

Comment 9

[Segun Famisa [:segun]]

Can confirm the issue seems to have been resolved for me in the nightly build - 153.0a1 (2026-05-30)