1630401 - completely white wikia page (due to blocked ad scripts?)

Status: RESOLVED WORKSFORME

(Core :: Privacy: Anti-Tracking, defect, P3)

Description

[Matthew]

Attachment: 2020-04-13.png

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0

Steps to reproduce:

(inconsistent?) open a wikia page with a large sum of tabs (from what I can tell, it's not consistent at all)

Actual results:

opened several different pages under the fandom.com format, and loaded the page for a split second before the page turning completely white.

Expected results:

the page should have loaded and stayed open, rather than turning completely white

Comment 1

[Firefox Bug Husbandry Bot]

Resetting severity to default of --.

Comment 2

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Hi,

Thanks for the details. I was able to reproduce on windows 10 pro, on the following versions

Firefox Nightly version 77.0a1 (2020-04-20) (64-bit)
Beta 76.0b5 (64-bit)
Release 75.0 (64-bit)

The link provided in the screenshot https://warframe.fandom.com/wiki/Warframes will trigger sometimes the white page, sometimes not.

https://warframe.fandom.com/wiki/Category:Secondary_Weapons happens every time , refreshing sometimes fixes it, sometimes it won't

I will move this over to a component so developers can take a look over it. If is not the correct component please feel free to change it to an appropriate one.

Thanks for the report.

Best regards, Clara.

Comment 3

[Chris Peterson [:cpeterson]]

Clara and Matthew:

1. Can you please post your Firefox's about:support information in this bug? I'm not able to reproduce on my Windows laptop. Perhaps there is a configuration difference between your machines and mine.

2. When the page turns white, do you see any error messages in Firefox's Browser Console? The keyboard shortcut to open the Browser Console is Ctrl+Shift+J.

3. Can you please post a screenshot of Firefox's DevTools inspector on the white page? The keyboard shortcut to open the DevTools Inspector is Ctrl+Shift+C. The Inspector screenshot might help the engineers determine if the page is white due to an HTML problem or a graphics problem.

Comment 4

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Here Chris,

Application Basics

Name: Firefox
Version: 77.0a1
Build ID: 20200429095105
Distribution ID:
Update Channel: nightly
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0
OS: Windows_NT 10.0
Launcher Process: Enabled
Multiprocess Windows: 1/1 Enabled by default
Remote Processes: 7
Enterprise Policies: Inactive
Google Location Service Key: Found
Google Safebrowsing Key: Found
Mozilla Location Service Key: Found
Safe Mode: false

Crash Reports for the Last 3 Days

Nightly Features

Name: DoH Roll-Out
Version: 1.3.0
ID: [e-mail]

Name: Firefox Screenshots
Version: 39.0.0
ID: [e-mail]

Name: Form Autofill
Version: 1.0
ID: [e-mail]

Name: Web Compat
Version: 10.1.2
ID: [e-mail]

Name: WebCompat Reporter
Version: 1.3.0
ID: [e-mail]

Remote Processes

Type: Web Content
Count: 3 / 8

Type: Privileged About
Count: 1

Type: Extension
Count: 1

Type: GPU
Count: 1

Type: Socket
Count: 1

Comment 5

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Attachment: white.webm

Also attaching video showing the two links provided being visited.

After a couple of refresh it's fixed.

https://warframe.fandom.com/wiki/Warframes

https://warframe.fandom.com/wiki/Category:Secondary_Weapons

Comment 6

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Attachment: no errors.PNG

Also, I don't see any error messages in Firefox's Browser Console.

Comment 7

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Attachment: devtools inspector.PNG

Here's a screenshot of Firefox's DevTools inspector on the white page. Hope it helps! Let me know if you need anything else.

Comment 8

[Chris Peterson [:cpeterson]]

Thanks, Clara!

From the console screenshot in comment 7, I see some ad and analytics scripts are getting blocked. I'm moving this bug to the Enhanced Tracking Protection (ETP) component because that might be related. Perhaps the page turns white because a full screen ad blocked?

Clara, can you please try re-testing with ETP disabled?

Instructions for disabling ETP:
https://support.mozilla.org/en-US/kb/content-blocking#w_remove-all-protections

Comment 9

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Attachment: block.webm

Hi Chris,

When disabling options , it is also triggered. Sometimes cookies need to be cleared as well. Please see attached video, let me know if I followed steps correctly.

Best,
Clara

Comment 10

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Attachment: remove.PNG

Comment 11

[Chris Peterson [:cpeterson]]

Thanks for the video demonstrating the bug and the console error messages.

Those t.document.body is null error messages look suspicious, suggesting the page content has been removed (even though Tracking Protection is disabled). I don't see those errors when loading the page normally. (I'm still not able to reproduce the white page problem.)

Comment 12

[Steven Englehardt [:englehardt]]

(In reply to Chris Peterson [:cpeterson] from comment #11)

Thanks for the video demonstrating the bug and the console error messages.

Those t.document.body is null error messages look suspicious, suggesting the page content has been removed (even though Tracking Protection is disabled). I don't see those errors when loading the page normally. (I'm still not able to reproduce the white page problem.)

I'm also not able to reproduce. This likely isn't related to tracking protection. Clara would you mind to see if you can reproduce in Safe Mode? (https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode)

Comment 13

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Attachment: safe mode.gif

Hi, it is also reproducible in safe mode. Please see attached video.
Let me know if I can help with anything else (or if I missed anything about safe mode)
Best,
Clara

Comment 14

[Tim Huang[:timhuang]]

I cannot reproduce this issue anymore with the latest Nightly. Would you be able to verify again? Thanks.

Comment 15

[Clara Guerrero ( Need Info Brindusa Tot Please)]

Hi Tim
I can no longer reproduce this in 95.0a1 (2021-10-26) (64-bit) either.
Best,
Clara