How do you deal with hostile browser extensions?
replies(5):
It really sucks when extensions do fudgy stuff in global space and sometimes break your stuff though, agree. Best approach I've found is to have a help page you can link to so people can go through the typical steps of "disabling all extensions, clearing cache, etc, etc" when things break in very unexpected way and you find no causes for it.
Many years ago I had performance issues with a site and the only reason I knew it was due to an extension is I dug into it with the dev tools and managed to identify Dashlane as the problem.