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/