1937052 - Sometimes after exiting Firefox, background processes will remain, causing the second startup to be very slow

Status: RESOLVED INVALID

(Firefox :: Session Restore, defect)

Description

[lindongbin]

Attachment: dbe9e2c9-fd6c-4fca-84cc-872db693acbe.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0

Steps to reproduce:

1. Set Firefox to clear history when Firefox is closed.
2. When you close Firefox, the Windows Task Manager background process will have a residual Firefox process, and each time you close it, a residual process will be added.
3. When you start Firefox, it takes about five seconds to open. If you terminate all the remaining background processes, it will open immediately.

Actual results:

If there are Firefox processes left in the background, each startup will take a long time

Expected results:

There should be no residual processes in the background, which causes Firefox to start slowly

Comment 1

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

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

Comment 2

[Negritas Sergiu, Desktop QA]

Hello! Thank you for submitting this issue I have tried to reproduce the issue on my end but unfortunately I wasn't able to with firefox 134.0a1(2024-12-16) on Windows 10
Could you please answer the following questions in order to further investigate this issue?

1. Does this issue happen with a new profile? Here is a link on how to create one: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles
2. Does this issue happen in the latest nightly? Here is a link from where you can download it: https://www.mozilla.org/en-US/firefox/channel/desktop/
3. Do you have any addons installed? If yes could you please list them?

Comment 3

[lindongbin]

Attachment: screen-20241219-234541.mp4

Comment 4

[lindongbin]

(In reply to Negritas Sergiu, Desktop QA from comment #2)

Hello! Thank you for submitting this issue I have tried to reproduce the issue on my end but unfortunately I wasn't able to with firefox 134.0a1(2024-12-16) on Windows 10
Could you please answer the following questions in order to further investigate this issue?

1. Does this issue happen with a new profile? Here is a link on how to create one: https://support.mozilla.org/en-US/kb/profile-manager-create-remove-switch-firefox-profiles
2. Does this issue happen in the latest nightly? Here is a link from where you can download it: https://www.mozilla.org/en-US/firefox/channel/desktop/
3. Do you have any addons installed? If yes could you please list them?

1. yes
2. Cannot reproduce in 135.0a1. The remaining process will disappear after a few seconds after exiting.
3. The problem exists when testing the release version on a clean configuration, without any extensions installed

Comment 5

[lindongbin]

Attachment: Screenshot_20241219-235928.png

and now I cannot set other profile to default

Comment 6

[lindongbin]

Uninstall and use the unzipped version, no residual processes will appear in the background