Opened 9 years ago

Closed 11 months ago

#5738 closed defect (worksforme)

Firefox slow at closing tabs

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


After upgrading TBB from 2.2.35-9 to 2.2.35-10 (linux i686), Firefox has become significantly slower at closing tabs (both using Ctrl-w or clicking on the tab X icon).

Possible causes: upgrade of Firefox (from 11 to 12), upgrade or other components (see changelog) or a combination of these.

Steps to reproduce: open 4-5 tabs, then try to close them: it will take about 2-3 seconds for each tab to close; with previous versions of the TBB, tabs would close almost instantly.

Child Tickets

Change History (6)

comment:1 Changed 8 years ago by cri

Setting "" to false in "about:config" speeds things up a bit (maybe you could make this a default setting?)

Also, I noticed that the sluggishness happens especially with some websites, so maybe this is not just a plain firefox bug.

comment:2 Changed 6 years ago by erinn

Keywords: needs-triage added

comment:3 Changed 6 years ago by erinn

Component: Tor bundles/installationTor Browser
Owner: changed from erinn to tbb-team

comment:4 Changed 3 years ago by teor

Severity: Normal

Set all open tickets without a severity to "Normal"

comment:5 Changed 23 months ago by reportUrl

Keywords: tbb-performance added; tbb tab slow needs-triage removed

comment:6 Changed 11 months ago by gk

Resolution: worksforme
Status: newclosed
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