contentabc.com

[SampeiNihira]

There is a blocking rule in the EasyList filter list for the website specified in the title.
It is possible to see that with uBlock Origin the following is applied:

Instead it seems to me that with uBlock Origin Lite this blocking rule is not applied.
Is it possible to know the reason?
Thank you.

[gorhill]

It is applied?

If your question is really why there is no nice informative blocking page, it's because of MV3 limitations.

uBO uses a heuristic to choose whether to block or not blocked a top document, and when it blocked it redirect to a dynamically crafted extension URL, something which can't be directly ported to MV3.

Whether it is possible to craft a set of DNR rules to enforce block-and-redirect top documents is something still left to explore.

[SampeiNihira]

I didn't understand what the block page looks like to the user.
I am obliged to give another example.
The website below has a blocking rule in both EasyList (uBlock Origin Lite) but also in AG Base (AG Ablocker v.5.0.113).

It seems to me that there is a significant difference.

So how does a web page that complies with a blocking rule in UBO Lite filters usually appear to the user?
Thank you.

[stephenhawk8054]

It is applied?

I don't think it's applied. The message when a site is blocked should be ERR_BLOCKED_BY_CLIENT.

I checked another site 1nimo.com which should be blocked too, but I don't see it being blocked in uBOL either. My version is 2024.9.22.986

[gorhill]

I don't think it's applied. The message when a site is blocked should be ERR_BLOCKED_BY_CLIENT.

Ah ok, so it's a case of the site not existing. Looking at the documentation, it says:

If [no resource types] is specified, all resource types except "main_frame" are blocked

So from memory I left out strict-blocking in uBOL since it's based on a heuristic in uBO. So I come back to my previous answer, something still left to explore.

[stephenhawk8054]

Yeah, I remember strict-blocking in uBOL needs to be specified with doc somewhere, but can't remember which discussion.

[krystian3w]

Ah ok, so it's a case of the site not existing.

This domain exists mainly as subdomains:

ads2.contentabc.com - 404 HTML
ads2.contentabc.com/ads?spot_id=4563949 - 30x -> 50x HTML

I don't know if it has active advertising/tracking campaigns without HTML 404 and 50x errors.

---

Similar to: #23, in AdGuard MV3 still works click2load with same bug (lost URL, button aren't clickable, maybe not as DNR rule).

[SampeiNihira]

I did a test with the 3 websites.
All three are blocked at the DNS level (I used NextDNS) by OISD + HaGeZi Multi Pro++.
Strict extension blocking would take priority over DNS level intervention.
These 2 filter lists make up for uBOL's lack of strict blocking.

[krystian3w]

Need to evaluate whether the lock-down heuristics still work for hosts lists and simplified EL syntax.