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R. Hill Profile picture
@gorhill
Apr 7, 2021 • 11 tweets • 4 min read • Read on X
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Of interest to advanced users.

uBlock Origin can function as a fully-fledged script blocker in default-deny mode:

1) Check "Disable JavaScript" in Settings pane
2) Enable "Medium mode"

github.com/gorhill/uBlock…
Result when visiting a typical webpage (note the "domains connected" figure, and the pluses in overview pane in the screenshots).

Only passive content resources allowed, such as images, CSS, etc.
Result when turning off the no-scripting switch.

This will allow only 1st-party JavaScript to execute.
A capability specific to uBO: allow scripts from a specific 3rd-party domain, but ONLY for the current site: scripts from disqus\.com are given permission to execute. With NoScript, allowing disqus\.com would allow it everywhere, on all sites.
But then if you really want to allow disqus\.com everywhere by default, it's just a matter of creating a global rule for it.
If you do not have time/patience to find the minimal set of 3rd parties which are needed to un-break a site, you can also just remove the block rule for all 3rd-party scripts (and frames) -- this will affect ONLY the current site.
If you have block rules for specific domains, they will still be enforced when removing the block rule for 3rd-party scripts, because they are more specific.
Note that at any step, uBO creates rules which are temporary. Use the padlock if you want to keep the changes -- this ensures you are not bloating your ruleset with every single change. Typically, your permanent ruleset is for sites you visit regularly.
Gray ("no-op") rule means "remove block rules affecting this cell, but keep applying filters from lists".

When you disable block rules, you will never ever end up being less protected than you would be with default settings/lists ("Easy mode" in graph).
You can assign a keyboard shortcut to the "Relax blocking mode" command, to lower blocking mode in steps, without having to visit the popup panel:

No JavaScript => No 3rd-party JavaScript => block as per filter lists.
Sorry for the noise, I had to re-post one of the tweet, it had too many typos in it, and I want to be able to use this thread as a reference.

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More from @gorhill

R. Hill Profile picture
Jan 13
There is a lot of chatter in the last days about how Youtube is slow with content blockers.

Those performance issues affect only the latest version of both Adblock Plus (3.22) & AdBlock (5.17), and afflict more than just Youtube.

uBO is *not* affected.

See issue tracker for both Adblock Plus and AdBlock:



A reminder that both blockers are owned by the same entity and use the same filtering engine -- using both at the same time make no sense.gitlab.com/groups/adblock…
I investigated a bit the performance regressions, and the cause is many distinct code paths, and affect many sites, those for which the problematic code paths are triggered.
Read 23 tweets
R. Hill Profile picture
Apr 24, 2021
The mere existence of such bypass mechanisms does not warrant labeling proven privacy-enhancing tools as "snake oil" (which Wikipedia defines as "euphemism for deceptive marketing"), so I take issue to see uBlock Origin being labeled as such.
If the mere existence of such bypass mechanisms is enough to label proven privacy-enhancing tools as "snake oil", then wouldn't Google's FLoC also deserve the label?
Regarding my use of "proven privacy-enhancing tools" above:

"What a Tangled Web We Weave: Understanding the
Interconnectedness of the Third Party Cookie Ecosystem", 2020
Read 8 tweets
R. Hill Profile picture
Apr 5, 2021
These instances of wrongdoings have been made public 11 years ago by Wikileaks
I have this mental image of a large dark canvas representing all the wrongdoings still not brought to light with a few pixels representing the light shone on the instances reported in this documentary Image
Excerpt, @johnpilger: "You must remember that the attack on Iraq -- although presented as a war -- was not a war, it was so one-sided, and it became an attack on the civilian population"
The same documentary on Youtube if you have issue playing it with the other link:
Read 5 tweets
R. Hill Profile picture
Jul 31, 2020
Too often I hear misinformed statements regarding JS-based content blockers -- worse when made in an authoritative manner.

So here I benchmark uBO's static filtering engine (responsible for enforcing EasyList et al.) with over 820K network filters.
This is the results using the built-in benchmark:
github.com/gorhill/uBlock… (you can try it for yourself).

I get ~11µs/request on average, which is no different than if I had benchmarked with just the default filter lists.
This is uBO's memory footprint with the over 820K network filters after visiting the 30 sites on the front page of HN, and after closing the tabs and leaving the browser idle for a minute.
Read 7 tweets
R. Hill Profile picture
Jun 24, 2020
An article concerning "Acceptable Ads" product from @ResPrivacy:

My thoughts regarding some parts of the article.
We do not actually know whether the several "Acceptable Ads" products are completely independent of each other:

Adblock Plus → Eyeo
Adblock Browser → Eyeo
Crystal → Eyeo
AdBlock → BetaFish
AdBlock Premium → Betafish
uBlock (not uBO) → Betafish
Note that the same year (2015) BetaFish (owner of AdBlock) was sold to an anonymous buyer, a new investment item, 13.466K EUR (converted from USD), was declared on Eyeo's balance sheet -- described as "shares in affiliate companies".
Read 9 tweets
R. Hill Profile picture
Jun 13, 2019
"Since Google's stated goal is to make ad blockers safer, The Register asked Google whether any ad blockers have actually abused webRequest. We've not heard back."

theregister.co.uk/2019/06/13/goo…
The abuse I've seen repeatedly is not of webRequest API: unethical blockers ripping the code base of legitimate blockers, but with an added permission which allows execution of remote code in extension context.

Just to show how easy it is to stumble onto these, I found another one within seconds (I believe this one uses code base of AdBlock despite "uBlocker" name).
Read 6 tweets

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