1270444 - Some odd trap and prank websites pages hangs and makes Firefox unresponsive for a long time with 100% usage of one CPU core

Status: VERIFIED WORKSFORME

(Core :: General, defect)

Description

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

STR:
1. Open this website page (care, it's NSFW) - http://4chonnet.on.zoy.org/
2. Press "Ignore this warning", as thankfully Firefox protects us from this
3. Enjoy watching:
- one of CPU cores being eaten alive in 100% all the time
- scripts warnings after some time - still can't close them, because Firefox is unresponsive
- external software prompts to Launch Application (mailto, callto and IRC links) and it's hundreds of them - also can't close them, because Firefox is unresponsive

Comment 1

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

Attachment: site.zip

I'm attaching the website page downloaded with "Save Page As" feature with "(Web Page, complete)" setting. I was finally able to download it using e10s, but even e10s had problems with stopping 100% usage of one CPU core, even using "Stop it" when message appear that this sites slowing my browser.

Also Avira AV says that in source it's JS/Agent.llo

Comment 2

[Andrew McCreight [:mccr8]]

I'm going to remove the URL so nobody clicks on it without seeing the NSFW warning.

Comment 4

[lightning1141]

I have the same issue.
If I open a new private browsing page, the CPU and Firefox will be ok after a few seconds.
If I do nothing, the CPU will stick at 100% for a long time.

Comment 5

[Dave Hunt [:davehunt] [he/him] ⌚BST]

Moving open bugs with topperf keyword to triage queue so they can be reassessed for performance priority.

Comment 6

[Dave Hunt [:davehunt] [he/him] ⌚BST]

:Virtual are you still able to reproduce this issue?

Comment 7

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

(In reply to Dave Hunt [:davehunt] [he/him] ⌚GMT from comment #6)

:Virtual are you still able to reproduce this issue?

Unfortunately, affected website page does not work anymore, even one posted in duplicate bug, so I do not know for sure if issue was fixed. Maybe someone from security team might know if this issue or even similar one was fixed in past.

Comment 8

[Dave Hunt [:davehunt] [he/him] ⌚BST]

Closing as incomplete due to inability to confirm if this is still an issue. We can reopen or create a new bug if this is discovered to still be an issue.

Comment 9

[Virtual_ManPL [:Virtual] 🇵🇱 - (please needinfo? me - so I will see your comment/reply/question/etc.)]

I want to add that I cannot reproduce the issue with the attached website page, so I am marking this issue as WORKSFORME.