1839605 - Gmail Calendar tab is blank after updating to Firefox 114.0.2

Status: RESOLVED FIXED

(Core :: Networking: HTTP, defect, P3)

Description

[Alex]

Attachment: Screenshot 2023-06-21 at 12.23.50.png

User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/114.0

Steps to reproduce:

Go to mail.google.com as logged in user and click on the calendar tab at the right.

I reproduce it both in my personal and work laptops (MacOS Ventura & Monterrey).

Actual results:

It is open but blank.

Expected results:

It should display the calendar.

Comment 1

[BugBot [:suhaib / :marco]]

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

Comment 2

[Alice0775 White]

I can reproduce this on Firefox113.0, 114.0.2, 115.0b7 as well as Nighrly116.0a1 Windows10.

STR:

1. Open Gmail w/ new profile and login
2. Click the calendar icon
3. Close the calendar pane
4. Close the Gmail tab
5. Open Gmail in new tab and login
6. Click the calendar icon

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=b5ac0f98346f7f545b912e6f13396d4a9bb5dd28&tochange=d529ccb6638b92890550fc5c8a13092b6b72e450

Comment 3

[BugBot [:suhaib / :marco]]

:CuveeHsu, since you are the author of the regressor, bug 1633935, could you take a look?

For more information, please visit BugBot documentation.

Comment 4

[Randell Jesup [:jesup] (needinfo me)]

@kershaw can reproduce easily; it will not reproduce if we disable the cache in devtools.

Comment 5

[Randell Jesup [:jesup] (needinfo me)]

Alex, do you need to use a sequence similar to Alice's to reproduce this? Does it still occur if you disable the cache via DevTools? Thanks!

Comment 6

[Randell Jesup [:jesup] (needinfo me)]

I suspect this is a race in the gmail/calendar pane code, where the order that loads finish in causes a failure somewhere in their code.
this would explain the cache impact, and it would also likely explain why regression-window chose Junior's patch, which could alter the order loads finish in I think

Comment 7

[Alex]

Hi! I reproduce it consistently without needing to close it. I just open the page, click the calendar icon and it breaks.

I tried with the Devtools open and the Disabled Cache enabled and it does work again. However it breaks as soon as I try again with the Devtools closed.

Thanks for looking into this! This bug itself is a big reason for me (and I know for other coworkers) to move to another browser, which I don't want to because I love Firefox :)

Comment 8

[Randell Jesup [:jesup] (needinfo me)]

Google pushed out a fix; they're still seeing some failures in the field, but it appears some people still fail. The one person I could talk to who still failed was fixed after clearing site data for gmail, so again that's something wrong with their site. They're planning another fix in the next few days.

The base problem is definitely their code not handling resources loading in a different order than they "expected"

Comment 9

[Randell Jesup [:jesup] (needinfo me)]

Leaving open just to track google's fixes

Comment 10

[BugBot [:suhaib / :marco]]

Set release status flags based on info from the regressing bug 1633935

Comment 11

[Randell Jesup [:jesup] (needinfo me)]

Fixed by google