Every web page crashes on Windows 7 with Tor Browser 8

added component::applications/tor browser owner::tbb-team priority::high reporter::testcy severity::normal status::needs-information tbb-crash type::defect labels

What antivirus/firewall software are you using? Does the crashing stop if you set browser.tabs.remote.autostart to false and restart? If that helps does it help as well if you let that pref set to true but adjust the security.sandbox.content.level to a lower level than you have right now?

Trac:
Keywords: N/A deleted, tbb-crash added
Summary: Gah! Your tab just crashed to Every web page crashes on Windows 7 with Tor Browser 8
Status: new to needs_information
Version: Tor: unspecified to N/A
Priority: Medium to High

I am using Comodo Internet Security 11. If I set browser.tabs.remote.autostart to false and restart, Tor crashes when visiting a web-page with the following error:

Problem signature: Problem Event Name: APPCRASH Application Name: firefox.exe Application Version: 60.4.0.6609 Application Timestamp: 00000000 Fault Module Name: msvcr100.dll Fault Module Version: 10.0.40219.325 Fault Module Timestamp: 4df2be1e Exception Code: 40000015 Exception Offset: 0008d6fd OS Version: 6.1.7601.2.1.0.256.1 Locale ID: 1032 Additional Information 1: 2dcc Additional Information 2: 2dcca317a17a2c66073f6e8fed21493a Additional Information 3: 4450 Additional Information 4: 4450de00666339552ac8275512186653

Trac:
Username: testcy

Can you try to uninstall Comodo Internet Security 11 (just for testing purposes) and restart your computer? It's often not enough to just disable antivirus software to stop it from interfering with other programs.

I uninstalled Comodo Internet Security 11 and restarted my computer, but the results are exactly the same as above (if browser.tabs.remote.autostart is set to true then tabs crash and if browser.tabs.remote.autostart is set to false then Tor crashes).

Trac:
Username: testcy

Okay, let's figure out whether it could be one of our patches causing the problem here. Can you take the bundle from https://trac.torproject.org/projects/tor/ticket/27503#comment:17 and run it on your system? There are instruction on how to do so in that comment (the bundle gives you actually a Firefox without all of our Tor Browser patches to make sure the "baseline" is working on your system).

https://people.torproject.org/~gk/testbuilds/27503_test.zip

The above seems to be working (by unzipping to Browser folder and running firefox.exe) with No proxy in Connection Settings.

Trac:
Username: testcy

Replying to testcy:

https://people.torproject.org/~gk/testbuilds/27503_test.zip

The above seems to be working (by unzipping to Browser folder and running firefox.exe) with No proxy in Connection Settings.

Great, please stick around to track this down. I'll start creating bundles for you to test to figure out what commit is breaking you (in case this is really related to our patches).

I can't imagine what might be causing this problem as I have not done any changes on my computer and everything else seems to be running fine.

Trac:
Username: testcy

Replying to testcy:

I can't imagine what might be causing this problem as I have not done any changes on my computer and everything else seems to be running fine.

Well, the weird thing is that you are the only one reporting such issues. We'll see if we can find anything. What about the following bundle? It's the most basic "Tor"-like one in the sense that it only contains our preference changes and our extensions we ship (that start Tor, which we ship, too):

https://people.torproject.org/~gk/testbuilds/torbrowser-install-win64-tbb-nightly_28823_1en-US.exe https://people.torproject.org/~gk/testbuilds/torbrowser-install-win64-tbb-nightly_28823_1en-US.exe.asc

The above bundle seems to be working fine.

Trac:
Username: testcy

Replying to testcy:

The above bundle seems to be working fine.

Okay. What about

https://people.torproject.org/~gk/testbuilds/torbrowser-install-win64-tbb-nightly_28823_2en-US.exe https://people.torproject.org/~gk/testbuilds/torbrowser-install-win64-tbb-nightly_28823_2en-US.exe.asc

In case that one works as well for you, could you test whether the latest alpha (8.5a6) is still broken for you (just to be sure we are not heading in the wrong direction). Thanks!

With the above bundle the message "Gah! Your tab just crashed" appeared once, but everything seemed to be working afterwards. The latest alpha (8.5a6) seemed to be working too, but with further testing I found that the message "Gah! Your tab just crashed" still appears with some web-pages. If I set browser.tabs.remote.autostart to false and restart, Tor crashes (stops responding) when visiting the same web-pages, with the following error:

Problem signature: Problem Event Name: APPCRASH Application Name: firefox.exe Application Version: 60.4.0.6609 Application Timestamp: 00000000 Fault Module Name: KERNELBASE.dll Fault Module Version: 6.1.7601.24308 Fault Module Timestamp: 5be86052 Exception Code: 20474343 Exception Offset: 000000000000bded OS Version: 6.1.7601.2.1.0.256.1 Locale ID: 1032 Additional Information 1: 3f72 Additional Information 2: 3f723d24147246fb72fa2429d046197b Additional Information 3: cb6b Additional Information 4: cb6b32465872ff41b9fbb90cdee96ba3

Trac:
Username: testcy

Hm, so I start to believe that you did not properly get rid off your av software for testing (you really uninstalled it? And no Commodo code was running anymore?). Do you have a set of web pages where those crashes are reproducible? Or are they always more or less happening randomly?

I thought uninstalling Comodo was just to make sure that it was not related and that I could install it again since the problem did not stop. The number of pages that crash I think is smaller now, compared with Tor 8. Some seem to be more consistent, but not always crashing with the latest alpha, for example https://www.skypub.com was always crashing yesterday and today seems to be working.

Trac:
Username: testcy

Replying to testcy:

I thought uninstalling Comodo was just to make sure that it was not related and that I could install it again since the problem did not stop. The number of pages that crash I think is smaller now, compared with Tor 8. Some seem to be more consistent, but not always crashing with the latest alpha, for example https://www.skypub.com was always crashing yesterday and today seems to be working.

Hm, then I wonder what makes it stop crashing. You are the only one that reported these kind of issues since 8.0 came out which, as I said, makes me wonder what could be different on your machine than on all the other hundreds of thousands Windows machines that work fine with Tor Browser. Do you have some Trusteer product on your computer as well?

I have been using Tor for a few years and up to version 7.5.6 it worked fine. Since version 8 came out this problem appeared. I have not installed any new software recently that should be causing such a problem. And I have been using Comodo for years without any issues. I don't use any Trusteer products. I find it strange that nobody else reported this issue. I don't think my machine is different from others.

Trac:
Username: testcy

One other thing I wondered: Do the crashes go away if you adjust your security slider to, say, "safer" or "safest"? (You can do so by clicking on the onion icon on the toolbar and selecting Security Settings...

I will try adjusting the security slider and see if it helps. Something new I noticed is a "NoScript XSS Warning" message appearing on certain web-pages that occasionally crash. I don't know if it is something related.

Trac:
Username: testcy

#23390 (moved)

Trac:
Username: omg

Every web page crashes on Windows 7 with Tor Browser 8

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