1876708 - firefox using 3.4gb of memory with a few tabs open

Status: RESOLVED INCOMPLETE

(Core :: Performance, defect)

Description

[pyknicginger]

Attachment: memory-report.json.gz

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:122.0) Gecko/20100101 Firefox/122.0

Steps to reproduce:

opened firefox

Actual results:

firefox does open, but it is immediately very slow and laggy. even typing this right now, it takes a second or two for groups of letters to appear. the more tabs i open, the worse it gets.

Expected results:

firefox to run normally--this is a relatively new issue from the past two, possibly three weeks.

Comment 1

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

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

Comment 2

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

This bug was moved into the Performance component.

:pyknicginger, could you make sure the following information is on this bug?

• For slowness or high CPU usage, capture a profile with http://profiler.firefox.com/, upload it and share the link here.
• ✅ For memory usage issues, capture a memory dump from about:memory and attach it to this bug.
• Troubleshooting information: Go to about:support, click "Copy raw data to clipboard", paste it into a file, save it, and attach the file here.

If the requested information is already in the bug, please confirm it is recent.

Thank you.

Comment 4

[Mike Conley (:mconley) (:⚙️)]

At least a part of this appears to be because there are tabs open with extremely large data URLs in them. These appear to be PDFs. If you close those tabs, does the browser responsiveness recover?

Comment 5

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

A needinfo is requested from the reporter, however, the reporter is inactive on Bugzilla. Given that the bug is still UNCONFIRMED, closing the bug as incomplete.

For more information, please visit BugBot documentation.