- A network of 24 media extensions that are installed on 800,000 users and collected viewing data and demographic information on major streaming platforms such as Netflix, Hulu, Disney+, Amazon Prime Video, HBO, Apple TV, and others
- 12 separate ad blockers with a combined install base of over 5.5 million users openly selling user data
- Nearly 50 other extensions, with over 100,000 users in aggregate, that collected and resold users’ browsing data
You can probably port it to a userscript without much trouble, and then you can use it in every browser using a single extension/addon along with other userscripts (which you can easily read the source code and disable auto updates of). I use Violentmonkey and have written a few scripts. Development and usage is easier than extensions/addons for personal stuff.
Personally I just use Dark Reader though.
I looked at a few (3?) monkey extensions (including violentmokey). I don’t remember the details but I think there were issues with all of them (probably privacy issues).