Restricting the list just to the ones I can find on caniuse or bugzilla, but this is a tiny, tiny subset. It also doesn't include the fact that implementations

Restricting the list just to the ones I can find on caniuse or bugzilla, but this is a tiny, tiny subset. It also doesn't include the fact that implementations are completely busted (IndexedDB for the longest time [1], ServiceWorkers [2]) https://caniuse.com/av1 https://caniuse.com/av1 https://caniuse.com/mdn-css_properties_contain https://caniuse.com/mdn-css_properties_contain https://caniuse.com/css-overflow-anchor https://caniuse.com/css-overflow-anchor https://caniuse.com/css-focus-visible https://caniuse.com/css-focus-visible https://caniuse.com/js-regexp-lookbehind https://caniuse.com/js-regexp-lookbehind [1] https://bugs.webkit.org/show_bug.cgi?id=226547 https://bugs.webkit.org/show_bug.cgi?id=226547 [2] https://bugs.webkit.org/show_bug.cgi?id=187461 https://bugs.webkit.org/show_bug.cgi?id=187461