1312151 - Firefox UI become unresponsive on large page, Web Content spikes at 100%

Status: RESOLVED DUPLICATE of bug 827937

(Firefox :: Untriaged, defect)

Description

[Francesco Lodolo [:flod]]

I'm trying to open this page and Firefox basically dies
https://hg.mozilla.org/mozilla-central/rev/4af41c7922f2

Current version: 52.0a1 (2016-10-21) (64 bit)
OS X 10.11.6 (15G1004)

Nightly Web Content spikes at 100%, I can't switch to another open tab. The only thing I can do is killing the Web Content process.
Even if I manage to close the tab, Nightly Web Content will remain stuck at 100%

I was recording a profile with Cleopatra and the main window even disappeared, which is something brand new. After killing the Web Content process it reappeared.

I'm not completely sure if the profile is useful, the only way I get to Analyze is by killing the Web Conten process.

This one was taked loading the page and closing the tab after a couple of seconds, somehow Cleopatra's tab loaded without killing the process
https://cleopatra.io/#report=4ef4bf04c4c76220d016be446413ccbc7ce699c6

Comment 1

[Francesco Lodolo [:flod]]

(uh, the amount of typos…)

I have the feeling this might be related to some network issues loading the page (it remains loading forever in Chrome). Still, not a good reason to kill my entire browser.

Also, can't stop loading the page in Firefox even if I try.