User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:85.0) Gecko/20100101 Firefox/85.0

Steps to reproduce:

This is a new Bug opened as requested by :gcp on similar thread. This error has been happening for me for quite a while, and I will copy my reports here. What happens is simply, from time to time, when you middle click, or CTRL+click on a link to open on a new tab, that tab crashes completely. It does not open, the title is the link, most of keyboard shortcuts do not work (for example, CTRL+T or CTRL+W work, but CTRL+SHIFT+A does not), trying to use it on any way it does not work.

Retrying the link will work at some point. Might need 3, 4, 8 tries, or even just one.

The current system specs are:

Operating System: Kubuntu 20.04
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.68.0
Qt Version: 5.12.8
Kernel Version: 5.4.0-42-generic
OS Type: 64-bit
Processors: 4 × Intel® Core™ i5-3470 CPU @ 3.20GHz
Memory: 31,3 GiB of RAM

Application Basics

Name: Firefox
Version: 85.0.1
Build ID: 20210204182252
Distribution ID: canonical
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:85.0) Gecko/20100101 Firefox/85.0
OS: Linux 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020
Multiprocess Windows: 4/4
Fission Windows: 0/4 Disabled by default
Remote Processes: 10
Enterprise Policies: Inactive
Google Location Service Key: Found
Google Safebrowsing Key: Found
Mozilla Location Service Key: Missing
Safe Mode: false

Firefox Features

Name: DoH Roll-Out
Version: 2.0.0
ID: doh-rollout@mozilla.org

Name: Firefox Screenshots
Version: 39.0.0
ID: screenshots@mozilla.org

Name: Form Autofill
Version: 1.0
ID: formautofill@mozilla.org

Name: Reset Search Defaults
Version: 1.0.5
ID: reset-search-defaults@mozilla.com

Name: Web Compatibility Interventions
Version: 18.2.0
ID: webcompat@mozilla.org

Name: WebCompat Reporter
Version: 1.4.0
ID: webcompat-reporter@mozilla.org

Remote Processes

Type: Web Content
Count: 8 / 8

Type: Privileged About
Count: 1

Type: Extension
Count: 1

Add-ons

Name: Amazon.com
Type: extension
Version: 1.3
Enabled: true
ID: amazondotcom@search.mozilla.org

Name: Bing
Type: extension
Version: 1.3
Enabled: true
ID: bing@search.mozilla.org

Name: DuckDuckGo
Type: extension
Version: 1.1
Enabled: true
ID: ddg@search.mozilla.org

Name: Facebook Container
Type: extension
Version: 2.1.2
Enabled: true
ID: @contain-facebook

Name: FoxyProxy Standard
Type: extension
Version: 7.5.1
Enabled: true
ID: foxyproxy@eric.h.jung

Name: Google
Type: extension
Version: 1.1
Enabled: true
ID: google@search.mozilla.org

Name: Privacy Badger
Type: extension
Version: 2021.2.2
Enabled: true
ID: jid1-MnnxcxisBPnSXQ@jetpack

Name: Reddit Enhancement Suite
Type: extension
Version: 5.22.0
Enabled: true
ID: jid1-xUfzOsOFlzSOXg@jetpack

Name: RESTED
Type: extension
Version: 2.3.1
Enabled: true
ID: rested@restedclient

Name: Stylus
Type: extension
Version: 1.5.17
Enabled: true
ID: {7a7a4a92-a2a0-41d1-9fd7-1e92480d612d}

Name: uBlock Origin
Type: extension
Version: 1.34.0
Enabled: true
ID: uBlock0@raymondhill.net

Name: Wikipedia (pt)
Type: extension
Version: 1.1
Enabled: true
ID: wikipedia@search.mozilla.org

Name: Wizdler
Type: extension
Version: 1.32
Enabled: true
ID: {8e591fd4-8923-47d9-be8b-127b215dd95a}

Name: English (CA) Language Pack
Type: locale
Version: 85.0buildid20210204182252
Enabled: true
ID: langpack-en-CA@firefox.mozilla.org

Name: English (GB) Language Pack
Type: locale
Version: 85.0buildid20210204182252
Enabled: true
ID: langpack-en-GB@firefox.mozilla.org

Name: HTTPS Everywhere
Type: extension
Version: 2021.1.27
Enabled: false
ID: https-everywhere@eff.org

Actual results:

As for the test, we simply have to open a link on a new tab. What happens can be seen on one of the screenshots attached, the TAB opens crashed and does not work. Trying again may or may not work.

Expected results:

It should open the tab normally

The Bugbug bot thinks this bug should belong to the 'WebExtensions::Untriaged' component, and is moving the bug to that component. Please revert this change in case you think the bot is wrong.

A couple of info that could help:

• This is a work computer where I do not have sudo;
• My hard drive is encrypted;
• Although the problem is intermittent, it will happen in every Firefox session;
• Sometimes, I want to complete restart Firefox, but even closing some windows, if I go to "System Active" (KDE task manager) there will still be a xhroot and a Firefox process showing even with all windows closed. I need to kill those.

Link for previous data/report

• This link has the list of of shortcuts that work or don't when a tab crashes https://bugzilla.mozilla.org/show_bug.cgi?id=1604218#c5 ;
• This is my previous report, with the data on my previous system https://bugzilla.mozilla.org/show_bug.cgi?id=1604218#c31 ;
• Disabling add-ons does not stop it from happening ;
• My home page is the default one.

About the last point, if I open a new window (CTRL+N) and the start tab is the one broke, if you simply click on a link to open on that TAB, it will show the loading icon but nothing will happen.

The attached image shows the processes that are on the system, when searching for firefox, AFTER closing all windows. There is always a Sandbox -> Chroot hang when at least one tab crashed

Continuing on the examples after the previous screenshot, this is what happens if I try to open firefox again without closing the hang sandbox -> chroot processes. No matter how many tabs or windows I open, none will work.

If I close all windows, after a while (30 sec+, not sure exactly how long) the processes will be finished and if I reopen firefox it comes back to life.

Hey Yohan,
I tried reproducing this issue on the latest versions of Firefox Nightly 88.0a1 (2021-03-19), beta 87.0 and release 86.0.1 on Ununtu 20.04 but it doesn't crash for me.

Can you test the issue while in Safe Mode? You can find helpful info here : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode .
Also a fresh new profile could help. You can find more about creating a new profile here : https://support.mozilla.org/en-US/kb/troubleshoot-and-diagnose-firefox-problems#w_6-create-a-new-firefox-profile .
If possible, you can test this issue on the nightly build as well. Download the build from : https://www.mozilla.org/en-US/firefox/nightly/all/ .

As requested by Andfrei on #c5, the tabs still showing issues on safe mode.

Hey Andrei,

I posted screenshots of the issues both on a new profile and on safe mode on my main profile. I asked the support team to install at least 86.0.1, as soon as they do it I will processed with the tests.

(In reply to Andrei Purice from comment #5)

Hey Yohan,
I tried reproducing this issue on the latest versions of Firefox Nightly 88.0a1 (2021-03-19), beta 87.0 and release 86.0.1 on Ununtu 20.04 but it doesn't crash for me.

Can you test the issue while in Safe Mode? You can find helpful info here : https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode .
Also a fresh new profile could help. You can find more about creating a new profile here : https://support.mozilla.org/en-US/kb/troubleshoot-and-diagnose-firefox-problems#w_6-create-a-new-firefox-profile .
If possible, you can test this issue on the nightly build as well. Download the build from : https://www.mozilla.org/en-US/firefox/nightly/all/ .

Hey :andrei, I downloaded the current release (87.0) and the problem still happens.

Setting a component for this issue in order to get the dev team involved.
If you feel it's an incorrect one please feel free to change it to a more appropriate one.

Delete your current Firefox configuration directory. Run the following in the terminal: rm -r ~/.mozilla/firefox/
Start Firefox browser. A new . mozilla/firefox/ directory will be automatically created with fresh configuration files in it.
Try Firefox now and see if it works again.