i have to disable Ghostery on several sites (even if there are nothing i'm blocking on the site in question) and this started recently before that there were no problems anywhere

Does not follow "privacy by default", but requiers one opt-out to avoid one's data to be sold to third parties.

This Addon is bought by a data-company (see here: https://en.wikipedia.org/wiki/Ghostery#Criticism ).
Don't trust it anymore!
I would better recommend installing uBlock, who is made by a free person, is open-source (everybody can read and change the code) and does not sell its users data.

(I'm sorry for any mistakes, I'm german and just want to warn you)

https://adexchanger.com/data-exchanges/ghostery-sheds-ad-tracker-sells-off-plug-focus-compliance/

Explain why you don't consider this action selling user data. It is nothing about source code.

The addon that does't respect your privacy, collects your data to make money, and the developers who constantly delete negative reviews... Great job,.. highly recommended for people who have absolutely no idea what they are doing/installing!
Go ahead,.. delete this for the forth time.
I'll be back!

Remember,the leopard can not change its spots...when something goes free the product is you ;-)
"...Ghostery does not sell user data..." nowdays!...after having been dicovered to do it and rebuked...:-))

Finally Ghostery is up to the ethical standards of Mozilla Corporation, which bought them.
Before it was proprietary software spying on you for corporations.
Now it's open source software spying on you for corporations !
With those guys when it's free, you're the product.
https://www.evidon.com/company/our-clients/

Fehlanzeige

The extension causes a delay in rendering CSS, which again can be seen as a flicker/blinking before the page loads. This bug is already known to the dev-people, but there is still no fix! Extremely annoying, so i'll stop using this plugin now and start looking for alternatives!

I had to remove this app from my system because it was preventing me from signing on to Disqus, which I use for the purpose of commenting on different news web sites.

The product does work to block ads, but this was "overkill" for my purposes, lol

Love this addon but the last few releases have been broken for me, when I click the icon its blank and crashes the browser. I had to go back to to version 8.0.3.1 to get it working again. Firefox 58.0.1 Windows 10

This kind of addon is really what I hate. They claim to defend users by blocking trackers but their business model is actually selling your data to that very companies they claim to protect you from.

It's like Adblock plus. They get payed by advertisers to set them on the whitelist, that they of course enable by default because they know the general user will not touch that setting.

Firefox has its own track blocker build in, you can now enable it always on. I additional use ad-nauseam with some tracking filters enabled. It may be counter productive because ad-nauseam actually can click every ad for you in the background to generate false clicks and make them pay more money so they may be able to track you better but I just love that concept.

Replying to the dev below:
1. User data - tracker data. tomatos tomatos.
2. OK how are you making money now? I will not read that article. You are absolutely untrustworthy because you had a parent company like that in the first place. And probably doing some other new shady stuff.