huge memory leaks in version 88

[uvi]

after upgrade to firefox 88 on ubuntu 20.04 after few hours of usual firefox workload memory usage grow very fast. it was fine before upgrade and worked for days. now my system freeze 3 or 5 times in day (i have no swap).

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: firefox 88.0+build2-0ubuntu0.20.04.1
ProcVersionSignature: Ubuntu 5.4.0-72.80-generic 5.4.101
Uname: Linux 5.4.0-72-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
AddonCompatCheckDisabled: False
ApportVersion: 2.20.11-0ubuntu27.16
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: vova 2400 F.... pulseaudio
 /dev/snd/controlC1: vova 2400 F.... pulseaudio
 /dev/snd/controlC0: vova 2400 F.... pulseaudio
 /dev/snd/pcmC0D0p: vova 2400 F...m pulseaudio
BuildID: 20210415204500
CasperMD5CheckResult: skip
Channel: Unavailable
CurrentDesktop: KDE
Date: Wed May 5 11:56:11 2021
ForcedLayersAccel: False
IfupdownConfig: Error: [Errno 13] Permission denied: '/etc/network/interfaces'
IncompatibleExtensions:
 Russian (RU) Language Pack - <email address hidden>
 English (GB) Language Pack - <email address hidden>
 English (South Africa) Language Pack - <email address hidden>
 Default - {972ce4c6-7e08-4474-a285-3208198ce6fd}
InstallationDate: Installed on 2019-08-13 (630 days ago)
InstallationMedia: Kubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
PrefErrors: Unexpected character ',' before close parenthesis @ /usr/lib/firefox/omni.ja:greprefs.js:352
PrefSources:
 prefs.js
 user.js
Profiles: Profile0 (Default) - LastVersion=88.0/20210415204500 (In use)
RunningIncompatibleAddons: True
SourcePackage: firefox
UpgradeStatus: Upgraded to focal on 2020-04-25 (374 days ago)
dmi.bios.date: 08/12/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: F11
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: B85-HD3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.board.version: To be filled by O.E.M.
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrF11:bd08/12/2015:svnGigabyteTechnologyCo.,Ltd.:pnB85-HD3:pvrTobefilledbyO.E.M.:rvnGigabyteTechnologyCo.,Ltd.:rnB85-HD3:rvrTobefilledbyO.E.M.:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To be filled by O.E.M.
dmi.product.name: B85-HD3
dmi.product.sku: To be filled by O.E.M.
dmi.product.version: To be filled by O.E.M.
dmi.sys.vendor: Gigabyte Technology Co., Ltd.

[uvi (vladimir-umnov)]

I have upgraded to 21.04, no leaks here. So issue possibly with older libs used in 20.04
Also possibly it was in nvidia driver... not sure

please close bug report...