Hello,

both uBlock Origin and uMatrix are licensed with the GPLv3. Relevant links are

https://github.com/gorhill/uBlock#ublock-origin

or https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/

and

https://github.com/gorhill/uMatrix

or https://addons.mozilla.org/en-US/firefox/addon/umatrix/