1998695 - Memory Leak in Firefox 144.0.2

Status: UNCONFIRMED

(Core :: Performance: Memory, defect)

Description

[civiko8920]

Attachment: about:memory anonymized export

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:144.0) Gecko/20100101 Firefox/144.0

Steps to reproduce:

• Added portal.azure.com in taskbar with option "Add tab to taskbar" with session active
• Open the Azure Portal via this shortcut, navigate to a couple of pages, then leave the browser for some minutes.
• Attaching the anonymized memory report, the leaking process at the time of export was PID 29520 with 12GB+ of usage.

Actual results:

• One of the firefox process slowly starts leaking memory, increasing the Working set memory in Task Manager indefinitely.
• The process keeps on consuming all the available RAM, until Windows starts to stutter, blacking out, and ultimately crashing.
• Killing the affected firefox.exe process frees up the RAM.
• about:processes and about:memory don't show any anomalies in memory usage in the concerned PID.

Expected results:

• No memory leak.

Comment 1

[civiko8920]

Some screenshots and videos of memory leak can be found at: https://imgur.com/a/vHi8IkC

Comment 2

[BugBot [:suhaib / :marco/ :calixte]]

The Bugbug bot thinks this bug should belong to the 'Core::Performance: Memory' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Comment 3

[civiko8920]

Attachment: PID 29520 in Task Manager

Comment 4

[BugBot [:suhaib / :marco/ :calixte]]

The severity field is not set for this bug.
:jlink, could you have a look please?

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