This is factually incorrect. It is entirely safe to run JavaScript in your browser. Your definition of "a lot" doesn't fit this conversation, because it doesn

This is factually incorrect. It is entirely safe to run JavaScript in your browser. Your definition of "a lot" doesn't fit this conversation, because it doesn't represent constant and regular vulnerabilities. Browsers are very safe. Not perfectly safe, but very safe. Thinking otherwise is paranoia, just like not running JavaScript by default in your browser is paranoid.