no-one has mentioned perspectives (perhaps arguably because it's not an alternative, but a patch to help make the existing approach more reliable), but it exist

no-one has mentioned perspectives (perhaps arguably because it's not an alternative, but a patch to help make the existing approach more reliable), but it exists now and seems to work - https://chrome.google.com/webstore/detail/perspectives/lnppfgdnjafeikakadfopejdpglpiahn?hl=en https://chrome.google.com/webstore/detail/perspectives/lnppf... https://addons.mozilla.org/en-us/firefox/addon/perspectives/ https://addons.mozilla.org/en-us/firefox/addon/perspectives/