821800 - Two Alt+Left Arrow clicks required to Go Back One Page (something a page does adds to history subtly)

Status: UNCONFIRMED

(Core :: DOM: Navigation, defect)

Description

[flotsam1]

User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0
Build ID: 20121128204232

Steps to reproduce:

Surf the web. WAIT a while for the page to COMPLETELY render and load content. Click on Alt+Left Arrow, or alternatively Back button on 5-button mouse.


Actual results:

Page did NOT go back after completely rendered.
If you DOUBLE click Alt+Left Arrow, or Back mouse button, then Page WILL go back. 
If you single click while page is still loading content, then it will go back.


Expected results:

Page should have gone back after one click of Alt+Left Arrow.

Note this affects Firefox 10 on my work laptop as well. IE is not showing this problem.
A similar  issue seems to have been reported years ago and fixed by a patch. Bug might have slipped through regression testing, and has been around for a few versions of Firefox.

Comment 1

[flotsam1]

This issue is reproducible even in Firefox Safe Mode.

Comment 2

[Matthias Versen [:Matti]]

alt+left arrow and backspace works for me with  Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20100101 Firefox/17.0

Comment 3

[Loic]

WFM too on Win 7.

Could you test with a new profile, please:
https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles

Comment 4

[flotsam1]

I tried it with the new profile - same result. I then did some more tests, and it now seems limited to a specific (news) website, where if you navigate away from the main page to articles on this same website, then Alt + Left click will not work.(Articles open in same window)

The key is to wait till all content & ads have been loaded and rendered. Check it out: http://www.king5.com/

Thanks!

Comment 5

[[:Aleksej]]

Reproduced with 2012-12-17-03-08-50-mozilla-central-firefox-20.0a1.de.linux-x86_64

The site’s scripts probably do something that looks like following a link (I guess an anchor) to the browser.