1771487 - Webpage becomes white when screenshotting

Status: VERIFIED FIXED

(Firefox :: Screenshots, defect)

Description

[bloonyapprentice]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Firefox/102.0

Steps to reproduce:

1. Set the Website appearance to Dark in about:preferences
2. Navigate to https://bugzilla.mozilla.org.
3. Take a screenshot (Right-click -> Take Screenshot)

Actual results:

The webpage becomes white, and the screenshots taken are blank as well. The screenshot selection still works as normal though.

Expected results:

The webpage should remain unchanged so that screenshots can be taken correctly.

Note:

• This is somewhat similar to bug 1771047, except it involves Firefox's screenshot addon
• Dark Reader exacerbates the issue. Any page that gets darkened will have this problem

Comment 1

[bloonyapprentice]

Regression range:

6:22.74 INFO: Narrowed integration regression window from [51a3fc9e, f0c4c97a] (3 builds) to [0d8f25c4, f0c4c97a] (2 builds) (~1 steps left)
6:22.74 INFO: No more integration revisions, bisection finished.
6:22.74 INFO: Last good revision: 0d8f25c4388af0894425506e71024044f4d3402a
6:22.74 INFO: First bad revision: f0c4c97a8e6aa34214f287cb499321b6a0186c2f
6:22.74 INFO: Pushlog:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=0d8f25c4388af0894425506e71024044f4d3402a&tochange=f0c4c97a8e6aa34214f287cb499321b6a0186c2f

Comment 2

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

Set release status flags based on info from the regressing bug 1738380

Comment 3

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

:emilio, since you are the author of the regressor, bug 1738380, could you take a look?
For more information, please visit auto_nag documentation.

Comment 4

[Emilio Cobos Álvarez (:emilio)]

Attachment: Bug 1771487 - Ensure iframes in the screenshots UI are transparent after bug 1738380. r=sfoster

While at it, also ensure they have standards mode and utf-8 charset.

Comment 6

[Emilio Cobos Álvarez (:emilio)]

Comment on attachment 9278484 [details]
Bug 1771487 - Ensure iframes in the screenshots UI are transparent after bug 1738380. r=sfoster

Beta/Release Uplift Approval Request

• User impact if declined: comment 0
• Is this code covered by automated tests?: No
• Has the fix been verified in Nightly?: No
• Needs manual test from QE?: Yes
• If yes, steps to reproduce: comment 0
• List of other uplifts needed: none
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): very simple markup change to avoid the iframe to become opaque.
• String changes made/needed: none
• Is Android affected?: No

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/b109bc84b050
Ensure iframes in the screenshots UI are transparent after bug 1738380. r=Gijs

Comment 8

[Cristina Cozmuta (:CrissCozmuta)]

https://hg.mozilla.org/mozilla-central/rev/b109bc84b050

Comment 9

[Giorgia Nichita, Release Desktop QA]

Reproduced this issue on an affected Nightly build from 2022-05-27, on Windows 10 x64.
Verified fixed on Firefox 103.0a1( 20220531040928) on Windows 10, macOS 10.15 and Ubuntu 21.04.

Comment 10

[Pascal Chevrel:pascalc (PTO until April 26)]

Comment on attachment 9278484 [details]
Bug 1771487 - Ensure iframes in the screenshots UI are transparent after bug 1738380. r=sfoster

Visible regression, verified on nightly, approved for 102 beta 2, thanks!

Comment 11

[Pascal Chevrel:pascalc (PTO until April 26)]

https://hg.mozilla.org/releases/mozilla-beta/rev/def3ba1c4eae

Comment 12

[Giorgia Nichita, Release Desktop QA]

Verified fixed on Firefox 102.0b2 (20220531194922) on Windows 10, macOS 10.15 and Ubuntu 20.04.