Opened on 08/07/2015 at 09:57:54 PM

Closed on 01/20/2016 at 01:17:04 PM

#2875 closed defect (worksforme)

ModPagespeed defer_javascript issue with active ABP

Reported by:	Rotate	Assignee:
Priority:	Unknown	Milestone:
Module:	Platform	Keywords:
Cc:	sebastian, trev, mapx, arthur, kzar	Blocked By:
Blocking:		Platform:	Unknown / Cross platform
Ready:	no	Confidential:	no
Tester:	Unknown	Verified working:	no
Review URL(s):

Description (last modified by mapx)

Environment

Win 7, Chrome latest, Safari latest.

Observed behaviour

When I enable "ModPagespeedEnableFilters defer_javascript ", the page is going really fast.
I win at the Page Speed Insights Score added +30 points .
Unfortunately, there is then a few problems :

Chrome with active Adblocker plugin didn't render the page completely. It hangs in process ("waiting for Adblocker Plus" in the status bar.
In FireFox the problem doesn't occur with active AdBlocker.

With deactivated Adblocker everything is fine in Chrome and FF.
In Safari on iOS (eg. iPhone) the page will depend also.

Expected behaviour

Please take a look at this article-site: http://www.dance-charts.de/201508075831/felix-jaehn-feat-polina-book-of-love
Soundcloud-player, disqus and several other elements won't be loaded with active AdBlocker Plus in Chrome.

Change History (20)

comment:1 Changed on 08/08/2015 at 08:21:11 AM by mapx

Cc sebastian trev mapx arthur added
Component changed from Unknown to Platform

comment:2 Changed on 08/08/2015 at 08:23:04 AM by mapx

see in forum https://adblockplus.org/forum/viewtopic.php?f=2&t=29832

comment:3 Changed on 08/08/2015 at 08:23:23 AM by Rotate

At the moment "ModPagespeed defer_javascript" is deactivated at the article-site (see link above).

comment:4 follow-up: ↓ 5 Changed on 08/08/2015 at 08:24:45 AM by mapx

probably you should prepare a test page where ModPagespeed defer_javascript is always enabled

comment:5 in reply to: ↑ 4 Changed on 08/08/2015 at 08:44:35 AM by Rotate

Replying to mapx:

probably you should prepare a test page where ModPagespeed defer_javascript is always enabled

Coming soon...

comment:6 Changed on 08/08/2015 at 09:40:34 AM by mapx

Description modified (diff)

comment:7 Changed on 08/08/2015 at 11:13:00 AM by Rotate

Please check this test-page:

http://www.dance-charts.de/tippspiel

comment:8 Changed on 08/08/2015 at 11:22:57 AM by mapx

the test page is ok in firefox
it seems to be ok in chrome only adding this exception

@@||ad.yieldlab.net$domain=dance-charts.de

comment:9 Changed on 08/10/2015 at 09:22:08 AM by arthur

That should do it: https://hg.adblockplus.org/easylistgermany/rev/c848369d2bc0

comment:10 Changed on 08/11/2015 at 01:05:56 PM by Rotate

Unfortunately not. No change with the updated whitelist. Just checked.
The demo-page is not active at the moment. Too much bugs. I can reacitvate if you want for a certain time.

https://picload.org/image/iwggcld/adblocker.jpg

comment:11 Changed on 08/11/2015 at 01:32:11 PM by arthur

Yes, please re-activate it.

comment:12 Changed on 08/11/2015 at 05:20:14 PM by Rotate

It's active now on this site only: www.dance-charts.de/tippspiel

comment:13 Changed on 08/12/2015 at 03:40:40 PM by Rotate

Any new insights?

comment:14 Changed on 10/20/2015 at 11:19:40 AM by kzar

Cc kzar added

Hi Rotate, please can you update the ticket description with a concrete list of steps I should take to reproduce, with expected vs observed outcomes? I can't reproduce this as described but I don't want to reject the issue before I properly understand.

comment:15 Changed on 11/16/2015 at 10:03:53 AM by kzar

Resolution set to worksforme
Status changed from new to closed

Closing this for now as it has been about a month since I asked for help reproducing the issue.

comment:16 Changed on 12/31/2015 at 05:50:22 AM by Rotate

Resolution worksforme deleted
Status changed from closed to reopened

okay. Next try. Still the same problem:
Website doesn't render completly / breaks with active ABP in Chrome. Without there is no problem.
In Firefox it works fine with active ABP.

Examples:
www.dance-charts.de
www.dance-charts.de/tippspiel
www.dance-charts.de/201512306543/guns-n-roses-comeback-beim-coachella-festival-2016

Menu-navigation drop downs doesn't work or some elements in the right sidebar breaks.
"ModPagespeed defer_javascript" is active now. We should solve this problem.

comment:17 Changed on 12/31/2015 at 01:16:20 PM by mapx

@@||dance-charts.de^$genericblock
||tpc.googlesyndication.com/pagead/imgad$domain=dance-charts.de
||adclick.g.doubleclick.net^$popup,domain=dance-charts.de
||dance-charts.de/images/banners/*$domain=dance-charts.de
dance-charts.de##.advert

Last edited on 12/31/2015 at 01:26:10 PM by mapx

comment:18 Changed on 12/31/2015 at 06:12:42 PM by Rotate

Thanks. Seems to be working here.

Last edited on 12/31/2015 at 06:17:56 PM by Rotate

comment:19 Changed on 01/04/2016 at 04:24:36 PM by arthur

I couldn't encounter any issues on the provided links.

comment:20 Changed on 01/20/2016 at 01:17:04 PM by sebastian

Resolution set to worksforme
Status changed from reopened to closed

As far as I understand, ModPageSpeed is an nginx/Apache module that manipulates your web content to optimize performance. There is a setting defer_javascript which if enabled, causes the HTML to be rewritten in a way that scripts are loaded after the page finished loading.

According to OP, on their website, some third-party widgets (e.g. SoundClous, Disqus) doesn't load if using Adblock Plus and if defer_javascript is enabled. With the links provided above I couldn't reproduce that, however.

Since, others apparently couldn't reproduce the issue either with the information provided, I am closing this issue now. Feel free to reopen if it happens again, but provide exact steps to reproduce, the exact version of Chrome and Adblock Plus you are using, and your Adblock Plus settings.

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