🔗 Converter :: Firefox Add-ons
This bookmark is very old and the link may no longer work. Try this archived link from the Internet Archive:
🗃️ https://web.archive.org/web/*/https://addons.mozilla.org/en-US/firefox/addon/2286
Contextual unit and timezone conversion on any web page (units: several metric/Imperial, both ways, configurable; timezones: any timezone to your local time).