1512546 - Firefox freezes when switching between users with Mac fast user switching

Status: RESOLVED DUPLICATE of bug 1422855

(Firefox :: Untriaged, defect)

Description

[bjasper]

Attachment: firefox-bug.mp4

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Safari/537.36

Steps to reproduce:

1. Login to Mac as first user
2. Start Firefox
3. Fast switch to another user (using account name in menubar)
4. Fast switch back to first user


Actual results:

Firefox freezes for 10-20 seconds after logging back in from fast user switching.

During this time no clicks are registered and typing in the address bar doesn't not update the text as expected (however the autocomplete popup below it does update as expected).

Pressing new tab button doesn't work either.

After 10-20 seconds—Firefox unfreezes and all of clicks/typing happens quickly all at once.

I can reproduce this 100% of the time with 0 addons enabled on multiple user accounts.

Attached video that shows what's happening, backup video here: https://youtu.be/blwMSAC89BU


Expected results:

Firefox should load as expected without freezing

Comment 1

[bjasper]

"addons" should be "extensions"