1957402 - Only some of my extensions have been synchronized

Status: UNCONFIRMED

(WebExtensions :: Untriaged, defect)

Description

[wy471]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:136.0) Gecko/20100101 Firefox/136.0

Steps to reproduce:

I have install some extension on Firefox. I have use multiple device(windows 10, some distro of linux) and on most of them all the extensions have been synchronized.

Actual results:

When I have installed firefox on an other device (win 11) only a third of my extensions have been synchronized.

Expected results:

The same thing that do in previous case

Comment 1

[wy471]

more information here

https://www.reddit.com/r/firefox/comments/1jbv4uq/about_synchronisation_of_extensions/

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'WebExtensions::Untriaged' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[Alex Cornestean]

Hello,

I could not reproduce the issue when syncing between 3 instances of Firefox (two Firefox Release 136.0.4/20250326231000 and one Firefox Nightly 139.0a1/20250331215235) on Windows 10 and Windows 11.

I’ve initially installed 10 extensions on one Firefox instance and as soon as I signed in on the other two instances of Firefox, all 10 extensions got installed without issues. I’ve then proceeded to install smaller batches of extensions (4-5 extensions) on the other two Firefoxes, in turn, and check whether they get synced to the remaining browsers. All extensions were successfully synced to the other Firefox instances.

Comment 4

[Luca Greco [:rpl] [:luca] [:lgreco]]

Would you mind to look in a about:sync-log tab for the log file related to the time when the issue was hit on the machine where not all add-ons has been synced?

That hopefully could provide a few more details about the underlying issue that may have been hit.