Characters in URL bar populate one-by-one as popup window resizes with screen farbling on

[stephendonner]

Description

Characters in URL bar populate one-by-one as popup window resizes with screen farbling on

Steps to Reproduce

1. install 1.48.75
2. launch Brave
3. log in to LinkedIn
4. log in to Facebook
5. load https://www.linkedin.com/news/story/latest-layoffs-companies-making-cuts-6109906/
6. click on the Share button
7. click on Facebook
8. look at the resulting popup

Actual result:

Expected result:

NOTE: disabling brave://flags/#brave-block-screen-fingerprinting fixes it

Reproduces how often:

100%

Brave version (brave://version info)

Brave	1.48.75 Chromium: 109.0.5414.46 (Official Build) nightly (x86_64)
Revision	6e36b77363ef3febbe792af680fa1367993ddcf0-refs/branch-heads/5414@{#709}
OS	macOS Version 11.7.2 (Build 20G1020)

Version/Channel Information:

• Can you reproduce this issue with the current release?
• Can you reproduce this issue with the beta channel?
• Can you reproduce this issue with the nightly channel?

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• Does the issue resolve itself when disabling Brave Rewards?
• Is the issue reproducible on the latest version of Chrome?

Miscellaneous Information:

/cc @goodov @pilgrim-brave @pes10k @rebron @brave/qa-team @arthuredelstein @fmarier

[kjozwiak]

Reproduced as well basically running through the STR/Cases that @stephendonner mentioned via #27492 (comment).

• installed 1.48.75 Chromium: 109.0.5414.46 and ensured that BraveScreenFingerprintingBlockerStudy isn't visible under brave://version
• logged into both FB & LinkedIn
• opened https://www.linkedin.com/news/story/latest-layoffs-companies-making-cuts-6109906
• clicked on Share -> Facebook
• didn't reproduce the issue as BraveBlockScreenFingerprinting hasn't been enabled via BraveScreenFingerprintingBlockerStudy
• restarted the browser and ensured that BraveScreenFingerprintingBlockerStudy:Enabled via brave://version
• opened https://www.linkedin.com/news/story/latest-layoffs-companies-making-cuts-6109906
• clicked on Share -> Facebook
• you'll notice the issue that @stephendonner mentioned above re: the new window being resized as characters are loading
• disable brave://flags/#brave-block-screen-fingerprinting

Once brave://flags/#brave-block-screen-fingerprinting has been disabled, the issue stops occurring. I'm going to wait before uplifting brave/brave-variations#493 into production so @arthuredelstein can take a look. I don't think we need to revert brave/brave-variations#484 from Nightly as the population is pretty small. But we shouldn't enable the feature till we know more re: the above.

[stephendonner]

Verified PASSED using

Brave	1.49.88 Chromium: 110.0.5481.77 (Official Build) beta (x86_64)
Revision	65ed616c6e8ee3fe0ad64fe83796c020644d42af-refs/branch-heads/5481@{#839}
OS	macOS Version 11.7.3 (Build 20G1116)

Steps:

1. launched Brave
2. logged in to LinkedIn
3. logged in to Facebook
4. loaded https://www.linkedin.com/news/story/latest-layoffs-companies-making-cuts-6109906/
5. clicked on the Share button
6. clicked on Facebook
7. looked at the resulting popup

Confirmed the URL in the popup was immediately fully rendered

[kjozwiak]

Removing the QA Pass as we uplifted the above into 1.48.x via https://bravesoftware.slack.com/archives/CHGKGMHDJ/p1677519906590469 and we'll need to re-verify via 1.48.x. If we don't get a 1.48.x by the time 1.49.x goes out, we'll move this back and re-add the QA Pass label.

[kjozwiak]

The above will require 1.48.173 or higher for 1.48.x verification 👍

[kjozwiak]

Moving this back into 1.49.x as we never ended up getting another C110 update which means we never had another 1.48.x release. We're going to remove the 1.48.x - Release #6 milestone. Re-adding the QA Pass label as the above was originally verified via 1.49.x as per #27492 (comment) so this was technically already verified.