I was using it until it required additional rights for some reason. Then I suspected it to be making an online profile and selling it, so I uninstalled it.
Jan from ToS;DR here: I’m not sure why it required additional rights, but I can assure you that we’re not selling anything.
We are a fully non-profit and open project, if you still have doubts you can read the code to the extensions and install them manually via https://github.com/tosdr/tosdr-firefox (for Firefox) or https://github.com/tosdr/tosdr-chrome (for Chrome), and the other browser extensions are also there on Github.