1689158 - Freezing and massive memory leaks in Windows 10

Status: RESOLVED DUPLICATE of bug 1642415

(Firefox :: Untriaged, defect)

Description

[sysel.frantisek]

Attachment: 4KznVWWDe9.mp4

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.104 Safari/537.36

Steps to reproduce:

Open Firefox x64 82-latest.
Do anything in GUI - open new tab, use menu etc.

System info:
OS Name: Microsoft Windows 10 Home
OS Version: 10.0.19041 N/A Build 19041
System Type: x64-based PC
Total Physical Memory: 32 683 MB
Processor(s): Ryzen 3700X
GPU: Radeon RX 5700
Radeon software 20.12.1

Actual results:

Firefox GUI is freezing and proces managing GUI is consuming massive amount of memory. See video.

Comment 1

[Francesco Lodolo [:flod]]

Can you post the data from about:config?

Copy the raw data using the button at the top of the page, then use the Add Attachment button here in Bugzilla to paste.

Comment 2

[sysel.frantisek]

Attachment: cfg_info.txt

export of about:support

Comment 3

[sysel.frantisek]

Attachment: memory-report.json.gz

memory report (heap-allocated)

Comment 4

[sysel.frantisek]

I've found the source of problem. Czech language pack: https://addons.mozilla.org/cs/firefox/addon/czech-cz-language-pack/?utm_source=addons.mozilla.org&utm_medium=referral&utm_content=search

Comment 5

[Francesco Lodolo [:flod]]

The language pack is not a problem in itself. It can be if it's an obsolete version, which should be automatically disabled. If you

Did you remove the language pack before taking the info from about:support? I don't see it listed in the file you attached.

Comment 7

[sysel.frantisek]

Attachment: cfg_info_freezing.txt

Comment 8

[sysel.frantisek]

When I install new version of Czech language pack (86.0buildid20210126185730) it starts freezing again.

Comment 9

[Francesco Lodolo [:flod]]

(In reply to sysel.frantisek from comment #8)

When I install new version of Czech language pack (86.0buildid20210126185730) it starts freezing again.

Ugh, that's not what I expected :-|

Attaching the langpack here, I'll try to see if I can reproduce.

Comment 10

[Francesco Lodolo [:flod]]

Attachment: czech_cz_language_pack-86.0buildid20210126185730-fx.xpi

Comment 11

[Francesco Lodolo [:flod]]

(In reply to Francesco Lodolo [:flod] from comment #9)

Attaching the langpack here, I'll try to see if I can reproduce.

I can't reproduce with 86.0b2 (20210126185730) and cs langpack 86.0buildid20210126185730

But I realized you're installing Czech on top of a Czech build, which is causing the problem. I'm curious, why are you doing that?

Comment 12

[sysel.frantisek]

Well, it wasn't an intention, I've migrated my FF profile from Windows to Linux and back to Windows and I just didn't care about installed language pack. I think on Linux it was required for GUI localization.