No, when you run something like <script> while(true) {} </script>, it will only freeze the tab where you ran it, the browser UI and other tabs will still be res

No, when you run something like <script> while(true) {} </script>, it will only freeze the tab where you ran it, the browser UI and other tabs will still be responsible and usable. When you run this DoS, it makes the entire browser unusable, and exhausts your system memory, eventually crashing the entire browser.