How to block an element without blocking ads?

[annada-behera]

I want to support a site, so I prefer not to run uBlock on that particular site. But the site has a facebook comment plug-in. Now, I don't want to be tracked by facebook, so, I want to block facebook's plug-in without blocking the ads by Google or the site's own advertising. How can I do that? Is it even possible?

[mapx-]

if your site is www.example.com, add these rules in "my rules"

www.example.com * * allow
www.example.com facebook.net * block
no-cosmetic-filtering: www.example.com true

[mapx-]

@gorhill , I noted all the elements are whitelisted but not
||cm.g.doubleclick.net^ -- worker https://cm.g.doubleclick.net/push?client=ca-pub-7670433186403461&srn=gdn

tested on https://www.dcnews.ro/livetext-simona-halep-kiki-bertens-roma-2017-semifinale_543387.html

[gorhill]

Closing and marking as invalid, as per CONTRIBUTING.

[gorhill]

@mapx- Yes, the worker issue was reported here #2556. It should be fixed with dev build, I forgot to check. In any case, this line means uBO injected a child-src CSP to prevent workers, which would be of no consequences if the page/frame is not using workers (it's still not that common).

Edit: yes, fixed in current dev build.

[gorhill]

Regarding tracking by Facebook and other such sites: https://github.com/gorhill/uBlock/wiki/Dynamic-filtering:-to-easily-reduce-privacy-exposure.

So if you have that rule beforehand to block facebook.com everywhere, than @mapx- suggestion would become simply:

www.example.com * * allow
no-cosmetic-filtering: www.example.com true

Since the rule * facebook.com * block takes precedence over the rule www.example.com * * allow.