19fortyfive.com Freezes PM as it loads

[marigold]

Website: https://www.19fortyfive.com
Issue: PaleMoon 32.4 (macOS) sometimes freezes for 10's of seconds as the web page is loaded / rendered.
Developer Tools Web Console output:

Code: Select all

JQMIGRATE: Migrate is installed, version 3.4.0  
jquery-migrate.min.js:2:970
Initializing Smart Data Protector  
uc-block.bundle.js:1:105126
An iframe which has both allow-scripts and allow-same-origin for its sandbox attribute can remove its sandboxing.  
www.19fortyfive.com

[Night Wing]

Freezes on 64 bit linux Pale Moon too.

[Kris_88]

Off-topic:
It looks a lot like a Russian propaganda site. This site will disappear when Putin is escorted to The Hague. The problem with this site will solve itself, there is no reason to worry.

[marigold]

Off-topic:
With Putin openly supporting Trump, it shouldn't be surprising that some Americans support him. And 19fortyfive is an American conservative website - it has many more articles bashing Russia and Putin than supporting it. Anyhow, let's not bring politics here and get distracted ...

[Kris_88]

Off-topic:
And 19fortyfive is an American conservative website

Off-topic:
Certainly... This site is as “American” as Yandex Russians intentionally create such sites in other countries so that they can later refer to them as “authoritative foreign sources”.

[marigold]

All you are doing is speculating based on some content you perceived to be "anti-ukranian / pro-russian" - the authors who write for it are reputed and often present a conservative point of view of American politics and their office is in Washington DC, USA. Anyhow, this a pointless and meaningless discussion that has nothing to do with the topic ...

[Moonchild]

Can we just stick to the web compatibility support here? Content is irrelevant.
Thanks.

[CrimsonAkiha]

Going back to the original topic of web compatibility, I feel like I should say that I tried the link in the original post, and it managed to freeze the browser for minutes even though I had JavaScript, remote fonts, and remote media (Images, videos, etc) blocked by default.

It seems like whatever is causing the extreme hang is something specific to this page's use of HTML and CSS exclusively, but after viewing the page source, I can't really see what it is. It does load a lot of CSS, but nothing that looks really abnormal to me. There's a big block of CSS included in the main page to load a bunch of fonts for Cyrillic characters(I think?), but like I said, I had remote fonts blocked. The main page itself doesn't exceed 7000 lines of HTML.

Given that most of the time browser hangs seem like they're caused by excessive JavaScript (like in the case of YouTube, I've heard), this looks really weird. Importantly, this issue seems to be very unique to Pale Moon. So, the politics of the content is kind of irrelevant, because it'd be interesting to know why this is happening either way, and why it doesn't effect other browsers. Maybe there is something to be learned here that could improve Pale Moon's performance generally.

[marigold]

It seems like whatever is causing the extreme hang is something specific to this page's use of HTML and CSS exclusively ...

You are right. I disabled javascript and blocked all third-party scripts, and both same-domain and third-party CSS using uBlock Origin and when only the HTML and media file loads there are no issues. Only when the CSS files load and the site is being rendered, PM starts to freeze. I tried to load the CSS files one by one to figure out which one's causing the issue, but I couldn't isolate it. I am stuck and don't know how to investigate this further?

[adoxa]

It's display:grid causing the slowdown, but further analysis I'll leave to someone else. Here's a Modify HTTP Response filter that is not as slow, but still seems to display mostly right.

Code: Select all

[["www.19fortyfive.com",["/zoxpress\\/style/",["/display:grid;grid-template-a/g","display:block;grid-template-a"]]]]

[gepus]

Wonder if this is related to the issue:
This site appears to use a scroll-linked positioning effect. This may not work well with asynchronous panning; see https://developer.mozilla.org/docs/Mozi ... kedEffects for further details and to join the discussion on related tools and features!

BTW, the site loads fine in abandoned Waterfox Classic (Firefox 56.6)

However, IMO it would be easier to just use another browser for this site than hunting a corner case.

[marigold]

Issue with this website freezing PaleMoon persists in version 33.0.0.