301831 - Firefox may hang on some web-pages when preparing Print Preview with 100% of CPU

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[Paul Yanchenko]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.10) Gecko/20050716 Firefox/1.0.6

I found this bug when I tried to print my page. I could not make a test-case
because when I remove some blocks in html the bug misteriously disappears. Test
page is http://paul.jetstyle.ru/summary/
Firefox version 1.0.6 for Win32.
OS: Windows XP Professional Eng, SP1

Reproducible: Sometimes

Comment 1

[JBoston]

Attachment: Test html file that will cause Firefox to hang whenever the user attempts to print. The page is simply a large table, containing a few inner tables.

Comment 2

[JBoston]

Firefox will hang whenever the user attempts to print a page that contains a long table (specifically a table that is longer than one printed page). This will occur whenever the <thead> tag is used with the long table. If the table can be printed on a single page, printing works fine.

IE prints the tables correctly in both situations.

Comment 3

[Mike Tilley]

I noticed exactly the same bug - a table with <thead> tags will hang Firefox on print or print preview if it's long enough to spill over onto a second page.

I didn't report the bug because it's apparently fixed in nightly build 8/27/06.

However, I just checked in Firefox 2.0 RC1 - still hangs.

It's absolutely solid and reproducible. 

Comment 4

[Steve England [:stevee]]

Reporter, do you still see this problem with the latest Firefox 2? If not, can you please close this bug as WORKSFORME. Thanks!

Comment 5

[JBoston]

The problem is still reproducible. Check the attached test html file and try print preview. It still hangs in Firefox 2. Thanks.

Comment 6

[Steve England [:stevee]]

Could you also please try with a trunk build?
- http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/

Comment 7

[Henry Hartley]

I don't know if the is the same problem.  I'm using a stock 2.0.0.5 (Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.5) Gecko/20070713 Firefox/2.0.0.5) and get the same behavior with some pages on wikipedia.  Of the following three pages:

http://en.wikipedia.org/wiki/Paros
http://en.wikipedia.org/wiki/Naxos%2C_Greece
http://en.wikipedia.org/wiki/Santorini

Only the third (Santorini) prints.  The other two cause the browser to hang and CPU usage to go to 100%.  Clicking on the "Printable Version" links on those pages does not seem to make any difference.  Note that these pages DO NOT use <thead> tags, so this may not be the same bug.

Comment 8

[Henry Hartley]

Ignore Comment #7.  I opened a new bug report (389553) and that turned out to be a dupe of 285608 which was fixed a couple weeks ago (in Trunk).

Comment 9

[Samuel Sidler (old account; do not CC)]

I can confirm the hang using Firefox 2.0.0.6 on Windows Vista. However, it no longer hangs using a recent trunk build.

JBoston, can you confirm the same?

Comment 10

[Martijn Wargers (dead)]

Worksforme, using:
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9a9pre) Gecko/2007100304 Minefield/3.0a9pre

This is not going to be fixed in the Firefox2 cycle, I'm afraid, so I'm morphing this into a trunk bug and marking it worksforme.