Opened 3 years ago

Last modified 3 years ago

#21410 new defect

Pagewise scrolling up with [Shift]+[Space] not working on some websites

Reported by: Runawe Owned by: tbb-team
Priority: Medium Milestone:
Component: Applications/Tor Browser Version:
Severity: Normal Keywords: tbb-usability
Cc: Actual Points:
Parent ID: Points:
Reviewer: Sponsor:


On some websites, like articles on, one can scroll down pagewise with [Space] key, but not scroll up with [Shift]+[Space]. Pressing [Shift]+[Space] results in scrolling down one screen page; it should scroll up one screen page.

This seems to be related to JavaScript. Current Tor Browser 6.5 is affected in default settings, meaning security slider on low, but also on medium. When security slider is set to high, there is no problem scrolling up with [Shift]+[Space]. Also tested in Tails. (As far as I remember, this problem was also present in versions before 6.5.)

Testing in other (non Tor) browsers, [Shift]+[Space] works as expected, scrolling up pagewise. Also with uBlock Origin active or NoScript and some JavaScript blocked.

Example article where scrolling up with [Shift]+[Space] does not work in Tor Browser with default settings:

Child Tickets

Change History (2)

comment:1 Changed 3 years ago by gk

Keywords: tbb-usability added

5.0a4 is the first that breaks the correct behavior. My bet goes to our keyboard fingerprinting defense but I am bisecting it to be sure.

comment:2 Changed 3 years ago by Runawe

Problem still exists in Tor Browser 7.0.4

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