Opened 2 years ago

Last modified 19 months ago

#28434 needs_information defect

Windows Size issue on KDE with default taskbar/window frame sizes

Reported by: aerpel Owned by: tbb-team
Priority: High Milestone:
Component: Applications/Tor Browser Version:
Severity: Normal Keywords: tbb-fingerprinting-resolution
Cc: Actual Points:
Parent ID: Points:
Reviewer: Sponsor:


I ran the Tor Browser bundle on Debian stretch/stable (installed via the Debian repostories).
As DE, I am using KDE (plasma 5.8.6), with default taskbar/window frame sizes.
My screens resolution is 1680x1050.
I started using the Tor Browser with version 8.0 on this machine, and the issue has existed since.

Expected behaviour:
When opening the Thor browser, the windows height automatically adjusts to a multiple of 100 (<=1000) and a width of 1000.

Actual behaviour:
The windows opens in a size of 1000x895.

It seems that monitor height minus the Tor Browser Window title bar, the tab bar, the address bar and the KDE panel is 895 pixel.
Somehow the Tor Browser thinks it can reach 900 (which it cannot) and therefore, a size of 895 is reached, instead of the correct 800.

Therefore the whole concept of default windows sizes against browser fingerprinting is circumvented.

The window's size was determinded by, which was used to check how effective the Tor browser is against fingerprinting.

Child Tickets

Change History (3)

comment:1 Changed 2 years ago by gk

Keywords: tbb-fingerprinting-resolution added; window size adjustment removed
Priority: MediumHigh
Status: newneeds_information
Summary: Windows Size issueWindows Size issue on KDE with default taskbar/window frame sizes
Version: Tor:

Could you check whether the old one, 7.5.6, works in your setup (see: for bundles)?

comment:2 Changed 20 months ago by cypherpunks

Debian buster here, plasma 5.14.5 (breeze light theme) + tbb 8.0.6, panopticlick detects the screen as 1000x496x24. there's a decoration around the window that is just 4px (3px white padding + 1px grey border).

Last edited 20 months ago by cypherpunks (previous) (diff)

comment:3 Changed 19 months ago by Thorin

99% positive this is a duplicate of #27845 - see and previous and subsequent one for Linux and Windows results of TB (and FF) with toolbar and normal density

I just did a test in a VM using openSUSE with KDE Plasma (new window after each change)

  • no toolbar: 1000x900
  • compact toolbar: 1000x800
  • normal toolbar: 1000x898
  • touch toolbar: 1000x894

Unless you need OP to confirm he had the toolbar open with icons on it (the icon cause the extra padding)

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