1256403 - Firefox freeze on www.toyota.it when displaying double inset box-shadow

Status: RESOLVED DUPLICATE of bug 1250947

(Core :: Graphics, defect)

Description

[[e-mail]]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:45.0) Gecko/20100101 Firefox/45.0
Build ID: 20160303134406

Steps to reproduce:

Use Firefox 45.0, 64bit version, on Windows 10
Open http://www.toyota.it


Actual results:

Firefox freezes all the opened tabs.


Expected results:

I can view http://www.toyota.it

This problem occurs from firefox 45.0.
Earlier releases work fine.

Comment 1

[Loic]

Regression range:
https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=c8dc34a351704525de17dd5d50d882a4c2339b5e&tochange=46c095a4311b63b5b71a9384169f1b109806d8c0

Regressed by Bug 1227216.

Comment 2

[Loic]

Attachment: index.html (reduced testcase)

Comment 3

[Mason Chang [Inactive] [:mchang]]

This isn't an actual regression. We used to always be slow with box shadows. After we rewrote some of the box shadow code, we still fallback in odd cases where we can't speed it up. I don't think this should be tracked.

Comment 6

[Liz Henry (:lizzard) (relman/hg->git project)]

I don't think we can fix this in 45, but it seems that these edge cases can make sites not work and firefox completely freeze. So we probably do need to track it and work on fixing whatever possible, at least for this reproducible case.

Comment 8

[Liz Henry (:lizzard) (relman/hg->git project)]

Tracking this in the duplicated bug.