Open Bug 1948457 Opened 1 month ago Updated 15 days ago

Window rounding fingerprinting protection no longer works with vertical tabs enabled, all windows created maximized

Categories

(Firefox :: Sidebar, defect, P2)

Product:
Firefox
Component:
Sidebar
Version:
Firefox 137
Type:
defect

Tracking

()

Tracking Flags:
Tracking Status
firefox-esr115 --- unaffected
firefox-esr128 --- unaffected
firefox135 --- unaffected
firefox136 --- unaffected
firefox137 --- fix-optional

People

(Reporter: ke5trel, Unassigned)

References

(Blocks 2 open bugs, Regression)

Details

(Keywords: regression, Whiteboard: [fidefe-sidebar])

STR:

  1. Start with privacy.resistFingerprinting = true and sidebar.verticalTabs = true.
  2. Create a new window.

Expected:
Window created at a rounded size.

Actual:
All windows are created maximized.

Alternatively using FPP instead of RFP:

privacy.fingerprintingProtection = true
privacy.fingerprintingProtection.overrides = +RoundWindowSize

Regression window:
https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=8242e03983b74f66a96fe4c66f39800cf546fd03&tochange=8f7deb04827bde7e62c4d65059355b39a563d260

Regressed by Bug 1947526.

:sfoster, since you are the author of the regressor, bug 1947526, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Flags: needinfo?(sfoster)
Flags: needinfo?(sfoster)
Whiteboard: [fidefe-sidebar]
Severity: -- → S3
Priority: -- → P2

Removed fingerprinting-breakage since this isn't about RFP breaking something, but rather RFP being broken.

Blocks: uplift_tor_fingerprinting
No longer blocks: fingerprinting-breakage
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