I do want uMatrix ported to Firefox. The developer who ported uBlock[1] has now made it more easy for me to work on a port of uMatrix, as I have now a model on how to proceed + a lot of code which can readily be shared with uMatrix. Once it is ported, in all likelihood I will myself go back to use Firefox as my main browser.
[1] https://github.com/Deathamns/uBlock/tree/ports/xpi