I highly recommend Ghostery. I've been using it for quite a while now and have no complaints.
byoogle is the mastermind behind Disconnect. :)
Though I've been uneasy since Ghostery went closed source[1] but it's so easy to use and light on the browser. Disconnect is partially open source[2] too, and ABP is fully open source. I guess I might switch back to ABP if complains start for Ghostery.
[1]https://github.com/jonpierce/ghostery [2]https://github.com/disconnectme/
Without auditing, calling a server open source is meaningless.
That makes me never want to try the extension, no matter how good it may be.
(Kidding)
Either you are incorrect, or this functionality is non-obvious. Based on recent experience, I'm leaning toward the former.
When I go to edit my blocking options when a site doesn't play nice with Ghostery, I'm given options either to disable certain tracker-blocking or to disable Ghostery entirely on a given domain. There doesn't seem to be an option to stop blocking a given tracker only when its loaded from a certain site.
There is one tracker I've unblocked because it breaks functionality on one site, and I'm fairly certain I've seen its effects on a different site recently as well. It doesn't seem to have unblocked that tracker only for the one site I need it disabled to use.
For Chrome and Safari, click on the Ghostery icon to bring up its popup control, then click on the 'Edit blocking options' link which will give a checkbox list of trackers to enable/disable. Click out of the pop-up to close it then, reload the page.
For Firefox, bring up to pop-up, then click on the checkbox to the right of the slider, then click on the reload link to reload the page. The slider enables/disables the tracker browser-wide, the checkbox enables/disables for the current domain.
You're sure?
I wasn't sure of this last night when I wrote the comment, but I just tried it out with Google Analytics (since it's pretty ubiquitous), and it wasn't only unblocked on that domain.
And I believe I remember also seeing a statement to the effect of "we don't obfuscate the code in our XPI", so you could just extract the add-on as a ZIP file if you want to audit the source.
Note: Ghostery dev here.
Any browser add-on could be monitoring your entire on-line activity. Why the hell does that suddenly become a problem when one's up-front about what data they collect, when they collect it, and what they do with it?
And no, they don't say "trust me". As I mentioned in my first comment, they say "if you don't trust us, unpack the add-on and check the source yourself". Which you definitely can - I just did it myself to verify, and it looks like easy reading to me.
I have found that I don't need both Ghostery and an ad blocker - simply having Ghostery block the trackers will block the vast majority of ads, and the ones that don't get blocked are inoffensive and/or actually interesting.