1909632 - Page content disappears when auto-translate is enabled.

Status: RESOLVED FIXED

(Firefox :: Translations, defect, P3)

Description

[railioaie]

Environment:
Operating system: Windows 10
Firefox version: Firefox 128.0 (release)/ Firefox Nightly 130

Preconditions:

• ETP set to STRICT
• Clean profile

Steps to reproduce:

1. Navigate to: https://schnapsen.online/spielen
2. Click on Register

Expected Behavior:
Registration page displayed

Actual Behavior:
The registration page is not displayed properly

Notes:

• Not reproducible with ETP STANDARD/turned OFF (both Normal and Private Browsing)
• Reproducible on the latest Nightly

---

Created from webcompat-user-report:83020685-935c-45bc-b2d6-529ecc340dd0

Comment 1

[railioaie]

Attachment: Screenshot_86.png

Comment 2

[Dennis Schubert [:denschub]]

This appears to be working for us in the triage meeting - can you recheck?

Comment 3

[railioaie]

Hi, It's still reproducible. Please click on register to check.

Comment 4

[railioaie]

Attachment: Screenshot_4.png

Comment 5

[railioaie]

This is the link : https://schnapsen.online/registrieren

Comment 6

[Dennis Schubert [:denschub]]

A-ha, so we figured out that this is actually an issue with Firefox Translate! If you set it to "always translate German", the content just... disappears.

Comment 7

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

Since nightly and release are affected, beta will likely be affected too.
For more information, please visit BugBot documentation.

Comment 8

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

The severity field is not set for this bug.
:nordzilla, could you have a look please?

For more information, please visit BugBot documentation.

Comment 9

[Erik Nordin [:nordzilla]]

Interesting, this does seem to be an issue specific to having auto-translate enabled.

I used mozregression and narrowed it down to Bug 1837424, which seems to have caused the issue.

---

Steps to reproduce

• Navigate to about:config.
• Set the browser.translations.alwaysTranslateLanguages pref value to de, for German.
• Navigate to https://schnapsen.online/registrieren

Expected Behavior
The page is translated from German to the user's target language.

Actual Behavior
The main content of the page disappears after translation starts.

---

I have not yet taken the time to look further into what code change within Bug 1837424 may have caused this.

Comment 10

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

Set release status flags based on info from the regressing bug 1837424

:gregtatum, since you are the author of the regressor, bug 1837424, could you take a look?

For more information, please visit BugBot documentation.

Comment 11

[Greg Tatum [:gregtatum]]

This is a race between the initial translation and a mutation that happens. We need to keep track of submitted nodes and cancel the translation if a mutation happens, then re-submit with the mutation.

Comment 12

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

Set release status flags based on info from the regressing bug 1837424

Comment 13

[Greg Tatum [:gregtatum]]

I've been working on this, and it requires a pretty big change in the implementation to properly handle, so I wouldn't recommend uplifting the change.

Comment 14

[Greg Tatum [:gregtatum]]

Attachment: Bug 1909632 - Move the createTranslationsDoc to shared test code; r?#translations-reviewers!

Comment 15

[Greg Tatum [:gregtatum]]

Attachment: Bug 1909632 - Cancel translations that are mutated and re-submit them; r?#translations-reviewers!

Comment 16

[Greg Tatum [:gregtatum]]

Attachment: Bug 1909632 - Refactor confusing pseudo-spanish in test; r?#translations-reviewers!

I busted this test while working on this patch, and found the assertion
confusing with the somewhat incorrect Spanish.

Comment 17

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/30ac0bfbcc8c
Move the createTranslationsDoc to shared test code; r=translations-reviewers,nordzilla
https://hg.mozilla.org/integration/autoland/rev/197d1d95f847
Cancel translations that are mutated and re-submit them; r=translations-reviewers,nordzilla
https://hg.mozilla.org/integration/autoland/rev/34b62cca9618
Refactor confusing pseudo-spanish in test; r=translations-reviewers,nordzilla

Comment 18

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/30ac0bfbcc8c
https://hg.mozilla.org/mozilla-central/rev/197d1d95f847
https://hg.mozilla.org/mozilla-central/rev/34b62cca9618