firefox hangs on certain webpages

[Sven N.]

I will add this in a few minutes.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: firefox 80.0.1+build1-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.4.0-47.51-generic 5.4.55
Uname: Linux 5.4.0-47-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.20.11-0ubuntu27.8
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: privat 1414 F.... pulseaudio
BuildID: 20200831163820
CasperMD5CheckResult: skip
Channel: Unavailable
CurrentDesktop: KDE
Date: Thu Sep 17 09:29:42 2020
DefaultProfileExtensions: extensions.sqlite corrupt or missing
DefaultProfileIncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
DefaultProfileLocales: extensions.sqlite corrupt or missing
DefaultProfilePrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:730
DefaultProfilePrefSources: prefs.js
DefaultProfileThemes: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
InstallationDate: Installed on 2019-09-20 (362 days ago)
InstallationMedia: Kubuntu 19.10 "Eoan Ermine" - Alpha amd64 (20190919)
IpRoute:
 default via 192.168.10.1 dev eno2 proto dhcp metric 100
 169.254.0.0/16 dev eno2 scope link metric 1000
 192.168.10.0/24 dev eno2 proto kernel scope link src 192.168.10.20 metric 100
Profile0Extensions: extensions.sqlite corrupt or missing
Profile0IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
Profile0Locales: extensions.sqlite corrupt or missing
Profile0PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:730
Profile0PrefSources: prefs.js
Profile0Themes: extensions.sqlite corrupt or missing
Profiles:
 Profile1 (Default) - LastVersion=80.0.1/20200831163820 (In use)
 Profile0 - LastVersion=79.0/20200720193547 (Out of date)
RunningIncompatibleAddons: False
SourcePackage: firefox
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 05/23/2019
dmi.bios.vendor: Dell Inc.
dmi.bios.version: 1.8.1
dmi.board.name: 0CGP1G
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 10
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvr1.8.1:bd05/23/2019:svnDellInc.:pnLatitude5591:pvr:rvnDellInc.:rn0CGP1G:rvrA00:cvnDellInc.:ct10:cvr:
dmi.product.family: Latitude
dmi.product.name: Latitude 5591
dmi.product.sku: 0819
dmi.sys.vendor: Dell Inc.

[Sven N. (drecksoft)]

Go to https://www.aliexpress.com
Go something like changing the language or go to My Account => My Orders
Firefox will hang immediately.

Note that I did remove my profile for this test for a clean start. It also happens with my regular profile. It does NOT happen with the same firefox version in Windows.

[Olivier Tilloy (osomon)]

Thanks for the report Sven.

Could you please download and try the official firefox build at https://www.mozilla.org/firefox/download/thanks and let us know whether it is similarly affected?

Thanks!

[Sven N. (drecksoft)]

After a short test the official build seems fine.

[Sven N. (drecksoft)]

It just also happened with the official build. It's not as easy reproducible as with the ubuntu build but it happens after some time of heavy usage with multiple tabs.

[Olivier Tilloy (osomon)]

Thanks for following up on this issue Sven. Would you mind filing an upstream bug report at https://bugzilla.mozilla.org/enter_bug.cgi#h=dupes%7CFirefox, and sharing the link to it here?

Thanks in advance!

[Sven N. (drecksoft)]

Already done ;)
https://bugzilla.mozilla.org/show_bug.cgi?id=1665566

But it's a lot harder to reproduce it with the official build. You need to use the browser for quite some time and then try the method I mentioned.