Public bug reported:
Just received the upgrade. Unfortunately, firefox is hardly usable now.
Rather frequently, CPU usage jumps up to 100% of a core, with the FF UI
completely frozen. In some occasione, the hang is temporary. In others
it is permanent and the application must be terminated.
I suggest reverting ubuntu to FF 54 until the FF 55 issues are resolved
upstream.
ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: firefox 55.0.1+build2-0ubuntu0.17.04.2
ProcVersionSignature: Ubuntu 4.10.0-32.36-generic 4.10.17
Uname: Linux 4.10.0-32-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.5
Architecture: amd64
BuildID: 20170814193419
CurrentDesktop: KDE
Date: Wed Aug 16 00:07:52 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-12-12 (1342 days ago)
InstallationMedia: Kubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
SourcePackage: firefox
UpgradeStatus: Upgraded to zesty on 2017-05-04 (103 days ago)
** Affects: firefox (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug third-party-packages zesty
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https://bugs.launchpad.net/bugs/1710987
Title:
Since the update to 55.0.1 firefox hangs frequently with 100% cpu
usage
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