Privacy centric Internet search engine DuckDuckGo has been compiling a data set of web trackers and the firm is now sharing that data publicly and open-sourcing the code that generates it.
Tracker Radar details 5,326 Internet domains used by 1,727 companies and organisations that track users online.
The data is available to anyone, and browser maker Vivaldi said on Tuesday it has begun doing so.
The data and its adoption reflect the growing importance of protecting privacy. The online ad industry is one of the biggest privacy infringers, building profiles of people so that it can target ads more effectively.