Pretty sure 3rd party font blocking doesn't work

[sheerun]

Prerequisites

• This is not a support issue or a question
• I performed a cursory search of the issue tracker to avoid opening a duplicate issue
• I am running the latest version of uBlock Origin

I tried to reproduce the issue when...

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

URL(s) where the issue occurs

https://www.logitech.com/pl-pl/products/mice.html

Describe the issue

If I add *$font,third-party then if I open Network tab of Developer Tools, I see that all first-party fonts are blocked, for example: https://www.logitech.com/asset/fonts/lineto-brown-pro-bold.woff.

Screenshot(s)

uBlock Origin version

1.44.2

Browser name and version

Firefox 104.0.2

Settings

Add *$font,third-party to My Filters

Notes

No response

[mapx-]

It's about cname
https://www.reddit.com/r/uBlockOrigin/comments/f8qnpc/ublock_origin_1250_with_cname_uncloaking_is_out/

For example the first-party
https://www.logitech.com/etc.clientlibs/logitech/clientlibs/replatform/resources/fonts/logi-icon-2.woff2

is uncloaked as third party https://d1hy6rfccmvxt8.cloudfront.net/ which your third-party filter will block and so in the Network tab you'll see uBO is blocking ... first-party (which instead is third-party)

You can open the logger and see the cnames

[mapx-]

if you add (nullifying the cname operation)
@@||logitech.com^$cname

You'll get a "clean" network tab