Opened 3 years ago

Closed 14 months ago

Last modified 14 months ago

#23453 closed defect (user disappeared)

Unable to Handle Google Groups page with 5000 Discussion Threads

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


The use case is not to anonymize the user, but
to hide the user's location, for example, during traveling.

TorBrowser verson: 64bit, Linux, 7.0.5, based on Mozilla Firefox 52.3.0


step 1:
Log in to some Google Group that has at least 5000 threads,
possibly with the first threads being very old.

step 2:
Open a few more tabs, may be the list of users, may be
some threads with posts.

step 3:
Reduce the available CPU time by playing some video
in the background, but make sure that there will
be enough RAM left so that the swapping will not
kick in and the video really consumes only
CPU time, not RAМ from the TorBrowser.

step 4:
Try switch between the different TorBrowser tabs
and try to scroll the Google Groups lists.
The scrolling will temporarily jam, CPU consumption
of the TorBrowser goes high and after some waiting
the Google Groups list scrolling will work again fluently at the
opened TorBrowser tab, but after a switch to
another tab that also displays a google groups scrolling
widget, which does not need to include a very long list,
even scrolling of the short list of items jams. The
jam can be waited out and then, after the current tab
works fine, the previous one that previously worked fluently,
jams again.

step 5:
The switching of tabs can be repeated. All of that
without triggering swapping.


It might be related to the rendering engine
of the Firefox browser. People at Google probably
just test the Google web services only with their
own Google Chrome and they don't go to such extremes.

As the Mozilla Thunderbird mail reader is also based
on the Firefox code base, the scrolling related issues
of the Mozilla Thunderbird might also be related to the
Firefox rendering engine. For example, the Mozilla Thunderbird
mail reading program jams, when it tries to display an
email that has millions of ASCII characters in a single line.

Practical Philosophy:

The Mozilla Corporation is a huge corporation and if they,
with all of their resources, can let such basic things
slip through, then clearly they are not interested fixing it.
The TorBrowser team is smaller and slicker, so the only
chance of getting that fixed is the TorBrowser team.
May be You can offer the patches to the Mozilla Corporation later.

Child Tickets

Change History (3)

comment:1 Changed 3 years ago by gk

Keywords: tbb-usability-website added
Status: newneeds_information
Version: Tor: unspecified

Does this happen with a clean Firefox 52 ESR as well? (You can find bundles on:

comment:2 Changed 14 months ago by gk

Resolution: user disappeared
Status: needs_informationclosed

comment:3 Changed 14 months ago by cypherpunks

Nobody cares.

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