You can only prevent entire java script files from reaching your browser by blocking domains, which is not helpful when js is required for functionality. I use

You can only prevent entire java script files from reaching your browser by blocking domains, which is not helpful when js is required for functionality. I use umatrix and noscript. Both are set to block by default and tediously kept updated. Google has recently started undermining my efforts on YouTube by sending ads over the same connections as actual video data. The shitty truth is that at the moment, there are no practical ways for the end user to properly manage the execution of other people's code on their machines that happens through app stores and browsers (including binaries downloaded with them).