uBlock origin doesn't work on html files on chromium-based browsers.

[IREK-szef]

Prerequisites

• [X] I verified that this is not a filter list issue. Report any issues with filter lists or broken website functionality in the uAssets issue tracker.
• [X] This is not a support issue or a question. For support, questions, or help, visit /r/uBlockOrigin.
• [X] I performed a cursory search of the issue tracker to avoid opening a duplicate issue.
• [X] The issue is not present after disabling uBO in the browser.
• [X] I checked the documentation to understand that the issue I am reporting is not normal behavior.

I tried to reproduce the issue when...

• [X] uBO is the only extension.
• [X] uBO uses default lists and settings.
• [X] using a new, unmodified browser profile.

Description

uBlock origin with cosmetic filters which doesn't hide specified elements on local .html file. The same filter works fine when file is accessed using http protocol. Problem is only in chromium-based web browsers, in firefox same filter works fine on both http and file protocol. I tried checking allow access to file urls on chrome and edge, but it didn't help.

Kind regards, IREK-szef

A specific URL where the issue occurs.

file:///*

Steps to Reproduce

1. Use chromium-based browsers (I' sure that edge and chrome are affected).
2. add list with/or use generic cosmetic filter.
3. Open .html local file with element to hide. (This doesn't work on chromium-based browsers, but it does work in firefox)
4. Open the same file served from web server. (This works fine)

Expected behavior

Generic cosmetic filtering should work in both HTTP and file based in chromium-based web browsers. It should work the same as in Firefox.

Actual behavior

Generic cosmetic filtering doesn't work on file protocol on chromium-based web browsers.

uBO version

1.52.2

Browser name and version

Chromium-based browsers

Operating System and version

Windows 11

[liamengland1]

Did you check "Allow access to file URLs" on chrome://extensions/?id=cjpalhdlnbpafiamejdnhcphjbkeiagm?

[IREK-szef]

Unfortunately turning on allow access to file URLs, doesn't help. In file protocol on chromium browser even disabling JavaScript from ublock origin popup doesn't work, but everything work just fine in firefox.

[gorhill]

Generic cosmetic filtering doesn't work on file protocol on chromium-based web browsers.

Does this work in other content blockers such as AdGuard and Adblock Plus?

[liamengland1]

Doesn't work with Adguard.