649850 - Multiple "Back" entries added by some pages, such as answers.com

Status: RESOLVED WORKSFORME

(Core :: DOM: Navigation, defect)

Description

[Roman]

User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0
Build Identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:2.0) Gecko/20100101 Firefox/4.0

See STR.


Reproducible: Always

Steps to Reproduce:
1. Go to http://www.google.com
2. Go to http://wiki.answers.com/Q/Is_nylon_a_insulator_or_a_conductor
3. View the Back history and/or press Back

Actual Results:  
Two entries in the history on a clean profile. Four entries on my active profile (due to me being logged into some other sites?) - requiring four Back clicks to go back, of course.


Expected Results:  
A single entry in the Back history.


This is a regression: Firefox 3.6 does not exhibit this behaviour.

Comment 1

[aravindm]

Regression Range : 
Works:
Mozilla/5.0 (Windows; Windows NT 6.1; rv:2.0b3pre) Gecko/20100723 Minefield/4.0b3pre
Fails:
Mozilla/5.0 (Windows; Windows NT 6.1; rv:2.0b3pre) Gecko/20100724 Minefield/4.0b3pre
Pushlog:
http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=58101a16aff7&tochange=30239e4cebd8

Comment 2

[Thomas Ahlblom]

Same behavior in GNU/Linux.

WFM:
Mozilla/5.0 (X11; Linux x86_64; rv:2.0b3pre) Gecko/20100723 Minefield/4.0b3pre
20100723030902 58101a16aff7

Reproduced:
Mozilla/5.0 (X11; Linux x86_64; rv:2.0b3pre) Gecko/20100724 Minefield/4.0b3pre
20100724030705 30239e4cebd8

Thus, the Linux regression range is the same as in comment 1.


Also reproduced in:
Mozilla/5.0 (X11; Linux x86_64; rv:6.0a1) Gecko/20110414 Firefox/6.0a1
http://hg.mozilla.org/mozilla-central/rev/aa200a803e07

Comment 3

[Marco Bonardo [:mak]]

the only interesting bug there seems to be Bug 580819, cc-ing Blake

Comment 4

[Thomas Ahlblom]

Just an observation, and probably irrelevant, but anyway... Using the Web Console in the latest nightly I get three entries like the one below:

[14:52:01.497] An unbalanced tree was written using document.write() causing data from the network to be reparsed. For more information https://developer.mozilla.org/en/Optimizing_Your_Pages_for_Speculative_Parsing @ javascript:'<script>admeld_publisher%20%20=%2090;admeld_site%20=%20"wikianswersrow";admeld_size%20=%20"300x250";admeld_placement%20=%20"atf_wikianswers";</script><script%20src="http://js.admeld.com/meld120.js"%20target="_self"%20></script>':1

Comment 5

[Thomas Ahlblom]

Bug 643452 has some similarities with the current one, but doesn't have the same regression window.

Comment 6

[Boris Zbarsky [:bzbarsky]]

You actually want to be ccing smaug.  ;)

Comment 7

[O. Atsushi (Torisugari)]

dup of bug 646036?

Though this is the better summary, 646036#c4 is about dataloss, due to overwriting the session history (if I understand bug 580819 correctly).

Comment 8

[O. Atsushi (Torisugari)]

Attachment: small testcase

That's why I don't like jQuery very much.

Comment 9

[O. Atsushi (Torisugari)]

This bug and bug 646036 seem to me fixed in the trunk.
Maybe thanks to bug 646641 (or bug 673467 and bug 670318).

Comment 10

[Roman]

Confirmed; works in Nightly.