Ad Block filter universal syntax broken

Description

Until recently, excluding a domain prefix to a filter would cause that filter to be applied universally to all sites. For instance ##.foo would block any element with a css classname of “foo” on any site. This has stopped working.

Non-universal syntax still works (prepending the filter with a domain).

Steps to Reproduce

1. Manually add a custom filter via brave://adblock/ such as ##.foo
2. Visit a site with an element with that class
3. Element is not blocked

Actual result:

The custom filter is ignored

Expected result:

The custom filter is applied

Reproduces how often:

Easily reproduced

Brave version (brave://version info)

Brave: V1.26.77 (it was broken in the previous version too) OS: macOS 11.4 (ARM & Intel)

Version/Channel Information:

• Can you reproduce this issue with the current release? Yes
• Can you reproduce this issue with the beta channel? Maybe
• Can you reproduce this issue with the nightly channel? Maybe

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields? N/A
• Does the issue resolve itself when disabling Brave Rewards? N/A
• Is the issue reproducible on the latest version of Chrome? N/A

Miscellaneous Information:

N/A

[antonok-edm]

Had to use an EU VPN to see the cookiebanner in the first place, but now I see that it is indeed not hidden in standard Shields mode. Will work on a fix for that as well, since that’s still not intended. In the meantime, you should be able to fix it by setting Trackers & ads blocked (aggressive) either per-site in the Shields panel or globally in brave://settings/shields.

Edit: filed https://github.com/brave/brave-browser/issues/19085

[antonok-edm]

Yes, at the moment 1.31.x is Nightly and 1.30.x is Beta. Our release schedule is on the wiki if you’re curious.