specific-generic cosmetic filter is not disabled by generichide

[Yuki2718]

Prerequisites

• I verified that this is not a filter issue (MUST be reported at filter issue tracker)
• This is not a support issue or a question
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue
• The issue is not present after wholly disabling uBlock Origin ("uBO") in the browser
• I checked the documentation to understand that the issue I report is not a normal behavior

I tried to reproduce the issue when...

• uBO is the only extension
• uBO with default lists/settings
• using a new, unmodified browser profile

Description

Related issue: uBlockOrigin/uAssets#10336 (comment)
At the time *##.AdSense and @@||uploadbank.com^$ghide were in uBlock filters and the former triggered anti-adb.

A specific URL where the issue occurs

https://www.uploadbank.com/wdxx40hx9g0e

Steps to Reproduce

1. Add *##.AdSense and uploadbank.com#@#+js(acis, decodeURIComponent, return"%") to My filters and visit the URL
2. See anti-adb is triggered

Expected behavior

@@||uploadbank.com^$ghide should disable specific-generic cosmetic filters as per wiki. TBH otherwise specific-generic is too risky to use.

Actual behavior

Not disabled by $ghide.

uBlock Origin version

1.39.2

Browser name and version

94.0.2 (UA changed to Mozilla/5.0 (Android 11; Mobile; rv:93.0) Gecko/93.0 Firefox/93.0)

Operating System and version

Windows 10

[gorhill]

I cannot reproduce with this minimal steps to repro:

• To "My filters", add *##body
• Navigate to https://example.com/
• Result: page is blank
• To "My filters", add @@||example.com^$ghide
• Navigate to https://example.com/
• Result: page renders fine

[gorhill]

I can reproduce the issue, it seems some cached value regarding whether generic cosmetic filtering is disabled or not is the issue.

[Yuki2718]

You're right, I have to check what was wrong on my side.

[Yuki2718]

@gorhill Can you check with the URL I posted? Here you see ghide and *##.AdSense are both applied:

Screenshot

Update: missed your comment

I can reproduce the issue, it seems some cached value regarding whether generic cosmetic filtering is disabled or not is the issue.

[gorhill]

Ok it's because the page creates an about:blank frame and uBO checks whether generic cosmetic is disabled in about:blank, which it is not. uBO needs to replace about:blank with the URL of the owner of that blank frame.

[gorhill]

ghide prevents implicit display: none !important, it does not touch explicit styling.