> all of which were designed back in the '90s, when we didn't appreciate just how dangerous an environment the Internet could become. No, it was in the 2000's

> all of which were designed back in the '90s, when we didn't appreciate just how dangerous an environment the Internet could become. No, it was in the 2000's and 2010's. And even more than 10 years ago, people were aware of how Internet can be dangerous, as shown by Internet Explorer. Moreover, Firefox had sandboxing before Chrom* and Electrolysis: 1. https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Security_best_practices_in_extensions https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Sec... 2. https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Displaying_web_content_in_an_extension_without_security_issues https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Dis... 3. https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Interaction_between_privileged_and_non-privileged_pages https://developer.mozilla.org/en-US/docs/Archive/Add-ons/Int...